If you do not have variations to be selected by natural or sexual selection on their superior abilities to survive and reproduce successfully then nothing can be naturally selected against the immediate environment.
Answer:
Plants release oxygen through photosynthesis.
<span>If sea level rises slowly, the reef might build upward. If sea level rises too quickly, the reef could die.</span>
The cerebellum which is a part of the brain would be responsible for the motor control,sensory perception,human movement and coordination. If there is then a damage the person may have problems in coordination as well as the senses would be loss.
DNA is the correct answer.
Hope it helps!