Question

published in 1962, rachel carsons silent spring began a national debate that changed amer... attitudes toward the environment. carson, originally a marine biologist, had begun noticing the adverse effects of pesticides on various ecosystems. in her book, she documents the effects of ddt, a pesticide that was then popular for agricultural use. in the environment, carson noted the collapse of food chains and the decline of bird, fish, and other animal populations; in humans, effects of ddt include a higher risk of cancer and other illnesses. the books central claim—that widespread pesticide use was the cause of significant harm to human health and to the environment—was highly controversial. conservationists, taking the books message to heart, succeeded in banning the use of ddt in the united states in 1972. others, however, pushed back against carsons claims. proponents of ddt usage pointed to the pesticide as a cost - effective means of controlling mosquito populations in parts of the world with high malaria rates. still, silent spring ushered in an era of greater awareness, leading people to start thinking more carefully about the environmental impact of chemical products. what is the meaning of adverse as used in the passage? intended

Explanation:

To determine the meaning of "adverse" in the passage, we analyze the context:

1. The passage states Carson noticed the effects of pesticides on ecosystems, followed by details like collapse of food chains, decline of animal populations, and health risks to humans.
2. These effects are clearly harmful or negative. The word "adverse" describes such negative impacts.

The option "intended" means planned or meant to happen, which does not fit the context of harmful, unplanned effects. A correct synonym for "adverse" here would be something like "harmful" or "negative" (though since the given option "intended" is incorrect, we identify that "adverse" means having a harmful or unfavorable effect).

If we assume there were other options (e.g., "harmful," "negative"), the correct meaning of "adverse" in this context is harmful (or a similar term indicating negative/unfavorable effects).

(Note: Since the provided option "intended" is incorrect, the correct interpretation of "adverse" here is "harmful" or "negative" based on the context of pesticide impacts on ecosystems and human health.)

Answer:

To determine the meaning of "adverse" in the passage, we analyze the context:

1. The passage states Carson noticed the effects of pesticides on ecosystems, followed by details like collapse of food chains, decline of animal populations, and health risks to humans.
2. These effects are clearly harmful or negative. The word "adverse" describes such negative impacts.

The option "intended" means planned or meant to happen, which does not fit the context of harmful, unplanned effects. A correct synonym for "adverse" here would be something like "harmful" or "negative" (though since the given option "intended" is incorrect, we identify that "adverse" means having a harmful or unfavorable effect).

If we assume there were other options (e.g., "harmful," "negative"), the correct meaning of "adverse" in this context is harmful (or a similar term indicating negative/unfavorable effects).

(Note: Since the provided option "intended" is incorrect, the correct interpretation of "adverse" here is "harmful" or "negative" based on the context of pesticide impacts on ecosystems and human health.)