I think I’ll go with C. long dry cold winters
Answer:
Birth is an example of a normally occurring positive-feedback mechanism.
Explanation:
During the process of photosynthesis, cells use carbon dioxide and energy from the Sun to make sugar molecules and oxygen. ... Then, via respiration processes, cells use oxygen and glucose to synthesize energy-rich carrier molecules, such as ATP, and carbon dioxide is produced as a waste product.
Answer: salivary glands
Explanation: i just remember from 4th grade health class