During which season is the sun highest in the sky?

a.
spring

b.
summer

c.
fall

d.
winter

The correct answer is B. Summer

During summer it's the highest and during winter it's the lowest. This highest in the sky part is called the Summer Solstice.

Asmall closed hole formed in an outwash plain or moraine. forms when a  glacier retreats then remains stationary. 

Answer (d) the greenhouse effect is primarily caused by car and trucks;