Hi there!
The best possible scenario for the giraffes with longer necks to survive would be one in which all the lower leaves somehow disappear! This would mean only giraffes with longer necks can eat therefore those will have a better chance of surviving. Luckily the answer that fits that perfectly would be...
D. Monkeys swarm in and tear off all of the lower leaves to use for shelters.

They are further classified into: fish, amphibians, birds, reptiles and mammals.
I hope I've helped : )
Answer:
Atomic Number: 8
Number of neutrons: 8
Mass of neutrons: 16 (AMU if you want the units)
Explanation:
The answer for both the number of neutrons and atomic number is on the top
The mass is at the bottom
DNA replication<span> is </span>semi-conservative<span> because each helix that is created contains one strand from the helix from which it was copied. </span>