12: on the first day of summer in the northern hemisphere, the sun is shining directly overhead in the noon time sky over what latitude? what else happens on the first day of summer in the northern hemisphere?

The Sun is shinning directly over the Tropic of Cancer which is the latitude 23.5 degrees north.

Explanation:

The first day of summer in the Northern hemisphere is the day with the longest period of light. That day the sunset sets slowly and takes longer to set below the horizon and your shadow is the shortest it will be in the whole year.

the correct answer is c