Match the climate change term in column 1 to the characteristic in column 2. Human activity

?

Produces greenhouse

gases

Sun's output

?

Peaked 20,000 years ago

Ice age

?

Can vary

Greenhouse

gases

?

Cause atmosphere to trap

more heat

Human activity  --  Produces greenhouse  gases.Greenhouse  gases  --  Cause atmosphere to trap  more heat.Sun's output  --  Can vary.Ice age  --  Peaked 20,000 years ago.

Explanation:

The human activity has created a large amount of greenhouse gases by the burning of fossil fuel and this fossil fuel is non-recyclable and causes the atmosphere to trap more heat and rise in global climate average. The ice ages have peaked in the past 10 - 20,000 years ago during the periods of interglaciation.

D.haka is the first answer and a.canberra is the second answer

Geothermic gradient is the rate of increasing temperature with respect to increasing the depth in the earths interior. away from tech tonic plates boundaries, it is about 25-40 c/km (72-87 degrees f/mi) of depth near the surface in most of the world.