Answer:
The sun is a major source of ultraviolet rays. Though the sun emits all of the different kinds of electromagnetic radiation, 99% of its rays are in the form of visible light, ultraviolet rays, and infrared rays (also known as heat).
Explanation:
Natural resources are resources that are not manufactured by humans. They are found in the earth and can be used without much modification.
Answer:
all 50 states answer to a central goverment and have the same currency. They have open borders with one another. They have diffrent cultures and state goverments
Explanation:
Answer:
Group Behavior
Explanation:
This behavior is selfish because it increases predator levels for members of the weaker groups and decreases predator levels for stronger members. However, this behavior is beneficial to all members of the group because it generates a tendency to populate the group with only strong individuals.
