The ends of the geologic eras such as the Paleozoic and Mesozoic are marked by "climate changes" since these changes brought about devastating effects on the climate, which was crucial for the survival of many animals and plant life.
Answer:
The Tuskegee Airmen were a group of African American fighter pilots in the U.S. Army Air Corps of World War II; the U.S. Air Force did not yet exist as a separate entity. The Army had resisted using black men as pilots but, in response to a pending lawsuit, conceded to creating a segregated unit for them.
It paided more and the rank they was given..
I believe the answer is d. Hope this helps.
