Question

What is an ice age?

a recent increase in the average global temperature near Earth’s surface
a period of time when temperatures across the planet are colder than normal
a characteristic of winter that returns seasonally
the loss of heat in coastal areas from La Niña storms

Answer 1

B. A period of time when temperatures across the planet are colder than normal

Step-by-step explanation:

Answer 2

a period of time when temperatures across the planet are colder than normal