Answer:
Greenhouse affect - atmosphere traps heat
Ice age - coldest phase of climate cycle
Sun's output - can vary
Greenhouse gases - atmosphere traps even more heat
Answer:
A. Provided them with much of their food
Answer: In Boeotia, central Greece
Explanation:
Panama is the central american country that ia an isthmus
Answer: a. Closer light source has stronger intensity. argues for this hypothesis
b. Earth's closest approach to Sun is in January. argues for this hypothesis
c. Earth's orbit is elliptical. argues against this hypothesis
d. S and N hemispheres have opposite seasons argues for this hypothsis
Explanation: This is my best guess.