How might human activities change to compensate for a decrease in water supplies?
a) humans might build a factory
b) humans might build draining system
c) humans might extract more water from the ground
d) humans behavior might not change because the water cycle

b) humans might build draining system

Explanation:

Human societies require water for various purposes like sanitation, cooking, drinking, washing, bathing, agricultural irrigation, industrial production and for other needs. Due to increase in abundance of the human population worldwide as well as with the increase in requirement. The human population may experience scarcity of water. Due to decrease in water supplies the human population has to take appropriate measure to meet the demand for water. Therefore, humans might build drainage system is the correct option. They can find the water body in their neighboring region so that a proper drainage system can be constructed which can supply necessary amount of water.  

many phylogenetic trees have a single lineage at the base representing a common ancestor. a lineage that evolved early from the root and remains unbranched is called basal taxon. when two lineages stem from the same branch point, they are called sister taxa.

can i get the brainliest pls

explanation:

b. lithosphere, asthenosphere, mesosphere   is the answer most likely