Question

why are albatrosses and petrels attracted to the smell of dimethyl sulfide (dms)?
it indicates that their prey are feeding nearby.
it is produced by the animals that they hunt.
it leads them to shore, helping them find land on which to rest from the open ocean.
it is released by injured animals, their favorite food.

Explanation:

Dimethyl sulfide (DMS) is produced by phytoplankton. When zooplankton (which are prey for albatrosses and petrels) feed on phytoplankton, DMS is released. The presence of DMS in the air indicates to albatrosses and petrels that their prey (zooplankton) are feeding nearby.

Answer:

It indicates that their prey are feeding nearby.