Avast plain of rolling hills are actually folds of

Given the following choices;

Monoclines

domes and basins

anticlines and synclines

horsts and grabens

The answer is domes and basins.

Domes are symmetrical anticlines hence their round shape. Vulcanic activity under the earth’s crust pushes up the portion of the crust. The overlapping folds of domes face inward. Basisn is the opposite of domes. They are symmetrical depressions of the earth’s crust and their overlaps face outward.

straight or amphibians are homeothermic to thermal