Question

at summer breeding grounds, insects provide food for a migratory bird species. how might climate change affect the birds?

the birds would consume all the insects, not leaving enough to reproduce.

the birds will no longer migrate, because the insects would be equally abundant everywhere.

because of climate change, birds might arrive at their breeding areas too early or too late to take advantage of the peak of insect abundance.

birds use temperature to find their summer breeding grounds, so due to climate change they cannot find the right location.

Explanation:

Climate change can disrupt the timing of natural events. Migratory birds rely on specific cues (like temperature changes) to time their migrations. Insects also have their own life - cycle timings related to climate. If the climate changes, the peak of insect abundance (which is food for the birds) may shift. Birds, following their usual migration timing (based on historical climate cues), might arrive at their breeding grounds either too early (insects haven't reached peak abundance yet) or too late (insect peak has passed).

• The first option about birds consuming all insects is not related to climate change in the context of the question.
• The second option that insects would be equally abundant everywhere is not a typical effect of climate change (which usually causes more variable and disrupted distributions rather than equal abundance everywhere).
• The fourth option is incorrect because birds use a variety of cues (not just temperature) for navigation, and climate change affecting temperature - based navigation is not the main issue related to insect - bird interaction in this context.

Answer:

Because of climate change, birds might arrive at their breeding areas too early or too late to take advantage of the peak of insect abundance.