Choose the simple sentence.

1.) A giraffe has a long neck so that it can eat twigs from the tops of
trees.
2.)Although most people fear lions and cheetahs, the hippopotamus
is considered the most dangerous nonhuman animal in Africa.
3.) A lion's coloring helps it to blend in with the grasses of the
savanna.
4.)Zebras are related to horses, but they have never been
domesticated.