Twice a year the Sun’s rays strike Earth north or south of the

Tropic of Cancer in the north and the Tropic of Capricorn in the south.

Explanation:

0.11 m/s and 0.28 m/s should be correct

i am pretty sure it is c because when people are closer together, they cannot move as freely. picture being in a mostly full elevator, for instance. the people are right next to you, and you can barely move.