The GREATEST impact on climate is made by O how directly the rays of the sun hit a location.
O elevation
O wind.
O whether or not the location is near water.

how directly the rays of the sun hit a location.

Explanation:

The ozone layer that's exist on Earth's atmosphere reduce the amount of heat that get into the earth from the sun ray. Pollutants that humans made from our day to day activity could actually damage this ozone and  reduce the amount of protection that it provide from the sun ray's heat. As a result, it resulted in high temperature that's abnormal to earth's environment.

Phenomenon like this could be the cause of several events such as melting ice in the north pole, burning forests, etc.

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