Which landform is characterized by low hills found between a plain and a mountain range?

The correct answer is the term "foothills." Foothills are the low hills that lie at the base of a mountain range, serving as a transitional zone between the flat plains and the higher mountain areas. They are typically characterized by a gentle slope leading up to the steeper inclines of the mountains. This unique position allows them to bridge the geographical and ecological differences between plains and mountains.

In contrast, plateaus are flat or gently rolling elevated areas that are typically much higher than the surrounding land and do not represent the transition between a plain and a mountain range. Deltas are landforms formed at the mouth of a river where sediment accumulates as the river slows and spreads out, creating new land as it meets a body of water. Basins are low-lying areas that may collect water or sediment; they do not have the specific characteristics that describe the transitional landform between plains and mountains. Understanding the features and contexts of these terms is crucial for recognizing how different landforms relate to one another and their environments.