The acrocephalid warbler is a bird often seen in wetlands.

A mantis flew into the garden.

I used a nail clipper to cut my nails.

This hermit crab can perform autotomy when it senses danger, allowing it to escape from enemies.

When he eats an apple, he uses his incisors to bite it off.

Orthoclase is a type of mineral, mainly found in granite.

There are more than a billion quintillion stars in this galaxy.

A regular polyhedron is a polyhedron where all faces are the same shape.

The cathode of this battery is made of copper.

These two variables are in a proportional relationship.