Which situation is an example of nonnative species introduction?

A huge volcanic eruption in Washington destroyed many habitats.

A large oil spill in the Gulf of Mexico killed many organisms that lived there.

Horseshoe crabs in the waters of Virginia have been overfished, and their numbers have declined.

Water hyacinths from Asia now grow in the United States and are crowding out animals and other plants.

D.

Explanation:

Nonnative species is defined as the introduction of an alien species, foreign species or exotic species to a new region and affect the native species.

The exampe of nonnative species is introduction of water hyacinths from Asia in the United States which is affecting the native species and making the ecosystem crowdy.

Introduction of non-native species can disturb the balance of an already-established ecosystem by the native species including plants and animals.

Hence, the correct option is D.