Why is selective cutting considered more sustainable than clear cutting?

How do antiviral drugs work? in your own words.

Hummingbirds drink nectar from flowers, while robins eat plant seeds. what does this reduce?

What is the function of the somatic nervous system? connects the brain and the spinal cord to the rest of the body carry signals to the muscles and glands includes all nerves controlling the muscular system and external sensory receptors controls internal organs like the heart and bladder