Question

what is climate change?
the natural cooling of earths atmosphere over time.
the reduction of greenhouse gases in the atmosphere.
the increase in temperature and changes in weather patterns due to human activity.
the process of seasonal changes in weather.

Explanation:

Climate change refers to long - term shifts in temperature and weather patterns. Human activities, especially the burning of fossil fuels (coal, oil, and gas), which releases greenhouse gases like carbon dioxide into the atmosphere, are the main driver of the current climate change. This leads to an increase in temperature (global warming) and changes in weather patterns.
The first option ("The natural cooling of Earth's atmosphere over time") is incorrect as the current climate change is mainly anthropogenic (human - caused) and not a natural cooling. The second option ("The reduction of greenhouse gases in the atmosphere") is wrong because climate change is associated with an increase in greenhouse gases (not a reduction). The fourth option ("The process of seasonal changes in weather") is incorrect as climate change is about long - term changes, not just seasonal weather changes.

Answer:

The increase in temperature and changes in weather patterns due to human activity.