Answer:
True
Explanation:
Unlike arteries, veins contain valves that ensure blood flows in only one direction. (Arteries don't require valves because pressure from the heart is so strong that blood is only able to flow in one direction.) Valves also help blood travel back to the heart against the force of gravity.
Answer:
including overfishing, coastal development, sedimentation, tourism overuse,
Explanation:
Cultural factor, ideational factor, political factor, economic factor
Answer:
When riding your bike on a trail always -> yield to hikers and horses.
Explanation:
So option A is your answer. Have a great day.
