Question

the water hyacinth is an invasive species that can spread extremely fast, blanketing a water surface in a very short period of time. it can limit boat traffic, swimming, and fishing, and it can deprive native plants and animals of sunlight and oxygen, thus reducing the local biodiversity. this situation demonstrates _________.
a. how migratory patterns change in response to alterations in an ecosystem
b. the effects of symbiosis
c. the effects of local evolution or migration on an ecosystem
d. how changes in biodiversity impact an ecosystem
please select the best answer from the choices provided

Explanation:

The water hyacinth reduces local biodiversity (by depriving native species of sunlight and oxygen). This shows how changes in biodiversity (reduction here) impact the ecosystem (limits boat traffic, swimming, fishing).

• Option a: No mention of migratory patterns in the text.
• Option b: Symbiosis is a close relationship between species (not shown here).
• Option c: No local evolution or migration (invasive species spreading, not evolving/migrating in a typical sense as per the option's implication) is the main focus.
• Option d: Correct as it aligns with the text about biodiversity change (reduction) and ecosystem impact.

Answer:

D. how changes in biodiversity impact an ecosystem