You are given a sentence and your task is to generate another sentence that supports the given input.

[Q]: Most extinctions are thought to have resulted from environmental changes that affected the species in either of two ways.
[A]: Environmental changes is most responsible for the extinction of most species of plants and animals that have lived on earth.


[Q]: Aquifers present the advantage of having large to huge volume storage capacity with a very low flow and are easily accessed through dug-wells or bore holes, either pumped or flowing (artesian wells) or through springs.
[A]: Dig a well allows people to access water in an aquifer that does not flow from a spring or a geyser.


[Q]: Features of pollen grains used in identification are size, shape, thickness of the exine (outer wall) and intine (inner wall) of the pollen grain.
[A]:
Each pollen grain has two coverings: the exine (thicker, outer layer) and the intine.