Answer:
The hierarchy of the Catholic Church is headed by the Bishop of Rome, known as the pope (Latin: papa; "father"), who is the leader of the worldwide Catholic Church. The current pope, Francis, was elected on 13 March 2013 by papal conclave.
Explanation:
Hey there!
The changes that were (necessary) in the Earth's atmosphere to allow complex organisms to evolve was a
collision from above such as a meteor and an increase in volcanic activity.
Your correct answer
. . .
. . .

Hope this helps.
~Jurgen
Answer:
I think your final grade is issued but not 100% sure
Answer:
The correct answer is: have more efficient working memory.
Explanation: