Why is it that in the usa, tornadoes occur mainly during the summer and also in the afternoons?

The tornadoes in the USA occur mainly during the summer afternoons because the excess warming of ocean water in summer afternoons warms up the air right above the water and stimulates a cycle of vertical circulation of air resulting in the generation of a tornado.

Explanation:

i'm sure the answer you are looking for would be

a. an ice age

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