Polar bears live in extremely cold areas.

He composed a beautiful requiem for his father.

Antarctica is the coldest place on Earth.

He is good at performing opera.

He is good at playing Beethoven's concertos.

My father works at a local broadcasting station.

The sinusoid is used to represent many phenomena in nature.

He is good at playing Beethoven's variations.

He recognizes the danger of extremism.

Echinoderms are a type of marine life, many of which have star-shaped bodies.