He continued to search to find the origin.

There are three pyramids in Egypt.

This plan was made based on facts.

Various plants and animals inhabit this park.

He ended up in a vegetative state after the accident.

Amphoteric oxides have the characteristic of reacting with both acids and bases.

Basic oxides react with acids to produce salt and water.

Protozoans are single-celled organisms.

The agricultural products of this region are very fresh and delicious.

Cnidarians are a type of marine life, including jellyfish and corals.