A. bind and unwind double helix
Answer:
A
Explanation:
technology has made it easier for people to get the nutrients they need through food. Better agriculture means that people don't have to hunt for food or out themselves in danger in order to get food. Clean water has lowered the risks of catching diseases that were in the water.
The correct answer is B. Natural selection occurs through generations and is in which organisms best suited to their environment survive.
