Question

look at the word in bold in paragraph 4.
4 acacia trees have a different way to keep enemies away: they hire \soldiers\ to protect them. the acacia tree provides a home and food for stinging ants. in return for their cozy life inside the trees thorns, the ants defend the tree against intruders. for example, if an unwanted animal gets too close to the acacia tree, then the ants will fight the animal off by stinging it.
5 even though ants help acacia trees, insects are often harmful to other plants, so some plants may try to keep insects away. for example, some plants can grow thick bark and waxy coverings that make it harder for insects to eat them. some sneaky plants will even give off a gas that smells so good that an insects natural enemies will come running! if the insect does not leave the plant alone, it will get eaten by its own predators.
what is the meaning of intruders as used in the text?
those who help you stay cool
those who give you food to eat
those who look different from you
those who come into your space uninvited

Explanation:

To determine the meaning of "intruders", we analyze the context. The acacia tree hires ants to protect it from enemies. The example says if an unwanted animal gets too close, ants fight it off. So "intruders" are those who enter the tree's space without permission. Let's check the options:

• "those who help you stay cool" is irrelevant.
• "those who give you food to eat" is incorrect as intruders are not providers.
• "those who look different from you" is not related to the context of unwanted entry.
• "those who come into your space uninvited" matches the context of unwanted animals getting close (entering the tree's space uninvited) and ants defending against them.

Answer:

those who come into your space uninvited