The most accurate response regarding 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.
During the Northern Hemisphere summer solstice, the Northern Hemisphere is tilted toward the sun, resulting in higher solar radiation and warmer temperatures in that region. Conversely, the Southern Hemisphere, particularly at latitudes farther away from the equator (e.g., Antarctica), receives much less solar radiation, which can lead to colder climates during this time.