1. In the food web, fishermen have begun large-scale fishing. Because of this, there has been a decline in the number of fish in
this ecosystem. Which population would decrease as a result of
the overfishing? Select the best answer.
a. The crabs
b. The krill
c. The zooplankton
d. The seagulls

The krill.

Explanation:

Krill are small crustaceans of the order Euphausiacea. They are found in all the world's oceans. The name "krill" comes from the Norwegian word krill, meaning "small fry of fish".

When the fisherman will start overfishing, krill will also come with their that net which will be used in fishing. As a result, the population of the krill will be decreased.

d

Explanation:

Because sea gulls feeds on fish if there is a decline of fish there will be decline of seagulls population too because of shortest food

Spiracles correlate with respiration, so I would say C.) an opening to tubes that take in air is your answer.

Hope I helped!