what causes a hemisphere on earth to have summer A direct sunlight from the son hitting that hemisphere. B indirect sunshine from the sun hitting that hemisphere. C that hemisphere closest to the sun relative to its closesness at other parts of the year

The seasons are caused because the Earth is tilted 23.5 degrees on its axis. Summer happens to the hemisphere tilted towards the Sun, and winter happens to the hemisphere tilted away from the Sun. ... That means that when it is summer in the Northern Hemisphere, it is winter in the Southern Hemisphere.

d₁ = displacement of tern from arctic to antarctic = 11000 miles

d₂ = displacement of tern from antarctic to arctic =   - 11000 miles

d = total displacement for the journey

total displacement for the journey is given as

d = d₁ + d₂

d = 11000 + (-11000)

d = 0 miles

t₁ = time of travel from arctic to antarctic = 3 months = 3 x 30 days = 90 days

t₂ = time of travel from antarctic to arctic = 3 months = 3 x 30 days = 90 days

t = total time of travel

total time of travel is given as

t = t₁ + t₂

t = 90 + 90

t = 180 days

average velocity is given as

average velocity = total displacement/ total time

v = d/t

v = 0/180

v = 0 miles/day