The ejecta from the volcano plays an important role in shaping the terrain.

My pet is a dog.

The study of organic compounds is an important field in chemistry.

This inorganic compound plays an important role in chemical reactions.

In marine biology, plankton is an important part of the marine ecosystem.

This structure was built centuries ago.

He is devoted to the study of neoplasms.

The products of this region are very delicious.

Angiosperms make up the majority of plant species on Earth.

Various plants and animals inhabit this park.