The best response to how latitude helps you investigate where the coldest climates on Earth might be during the Northern Hemisphere summer solstice is:
Latitudes farthest away from the equator in the Southern Hemisphere would experience less-intense solar radiation, or none at all, during the Northern Hemisphere summer solstice, likely leading to the coldest climates on Earth during that time.
This is because during the Northern Hemisphere summer solstice, the Northern Hemisphere is tilted toward the sun, resulting in more solar energy and warmer temperatures. Conversely, the Southern Hemisphere, particularly at high latitudes, receives less solar radiation and cooler temperatures during this time, potentially leading to the coldest climates on Earth.