Pretty sure its C. Because if you look it up it says that it <span>illustrate the complex relationships among economic, social, and environmental issues </span>
Changes in the orbit of the earth caused the ice sheets to spread across Canada.
Answer:
The average luminance of the Sun is about 1.88 giga candela per square metre, but as viewed through Earth's atmosphere, this is lowered to about 1.44 Gcd/m2. However, the luminance is not constant across the disk of the Sun (limb darkening).
Explanation:
It could cause drought and famine I believe