Question

which renewable source of energy faces the threat of gradually becoming scarce in various regions of earth?
a. water
b. tides
c. wind
d. sunlight

Explanation:

Water availability varies region - to - region. Droughts, over - extraction, and pollution can cause water scarcity in many areas. Tides, wind, and sunlight are more evenly distributed globally and less likely to become scarce in specific regions due to their natural and widespread nature.

Answer:

A. water