What does encumbered mean?
A. Helped by
B. Moved along
C. Weighed down
D. Fixed up

c. weighed down

(i dont know if any of these are really a good definition, but this is the most likely answer)

Explanation:

encumbered means to restrict or burden (someone or something) in such a way that free action or movement is difficult

1. c. zone of saturation, water table, zone of aeration

2. c. condensation

3. b.   conservation and condensation

4. c. groundwater dips below the water table in an artesian well

5. d. oceans

6. c. geyser

7. d. groundwater

8. b. 70%

9. d. transpiration

10. c.   desalination