Underground mammals, such as the ancestors of moles, are thought to have first evolved as the dinosaurs died out.

which effect of an environmental change does this best illustrate?

migration
loss of habitat
change in behavior
speciation

Speciation

Explanation:

a high pressure system is a dense air mass that is usually cooler and drier than the surrounding air. a low pressure system is a less dense air mass that is usually wetter and warmer than the surrounding air.

in general, areas that experience high atmospheric pressure also experience fair weather. low pressure systems can cause the formation of clouds and storms. air usually flows from areas of high pressure to areas of low pressure..