Question

about ____ years ago, the last ice age peaked.

a. 80,000
b. 40,000
c. 60,000
d. 20,000

Explanation:

The last ice age (Wisconsin glaciation in North America, Weichselian in Europe) peaked around 20,000 years ago. This is a key fact in Earth's climatic and geological history, related to the study of glaciation and paleoclimatology (a subfield of Geography or Earth Science, which falls under Natural Science). Among the options, 20,000 years ago is the correct timeframe for the peak of the last ice age.

Answer:

D. 20,000