Because of gravity... if you want a more detailed answer look it up on google!
Answer:
spring
Explanation:
A spring forms where the water table intersects the ground surface. Sometimes, the ground surface is lower than the water table. This forms a natural water flow as a spring.
- An artesian well occurs where pressurized formations containing ground water is found.
- Unsaturated zone is not filled with ground water.
- An aquifer is a porous and permeable formation that can store ground water
I assume that the question refers to the political affiliation of the Islands (They are Islands in the Mariana Trench, in the Pacific Ocean, south of Japan) - they are politically linked to the US - the correct answer is a). For example the Mariana islands have a commonwealth status within the US.
C. Birds eating seeds from plants
The amount of trees in a given location?