Q: Glaciers have been melting since what period?


Read this paragraph and choose the correct option from the provided answers:

Glaciers and ice sheets are melting. This can be seen clearly in photographs. The glaciers advanced during the Pleistocene ice age. They have been melting back since then, except for during the Little Ice Age. However, the rate of melting has increased tremendously in recent decades.

 Choices:

- industrial age

- bronze age

- stone age

- pleistocene ice age


A:
pleistocene ice age