B, hormones that serve as chemical messengers im not 100% sure though
Humans get D vitamin from sunlight. the plants perform photosynthesis and grow , we eat those fruits and vegetables grown in the plants. so indirectly we humans and other animals are benifitted from sun sunlight . flesh eating animals eat herbivores animala so they are also benifitted
Gametes are produced in meiosis, they are a sperm or egg that is fused together with another gamete to make a zygote.
I would say D...just because of the greenhouse effect
