Natural selection plays an important role in the evolution of organisms.

He is a famous author and a person who is respected by many people.

In the natural world, it is common for the weak to be culled out.

In the natural world, weak creatures are culled out.

He is weak, so he tends to get sick easily.

His only weakness is sweets.

He is very famous in the music world.

He broke new boundaries in the music world.

He has crossed that border.

I love nature.