What is the source of energy for plants?

The rate at which molecules water and oxygen can enter a cell is determined by the-

Natalie had random hand movements when she was two months old. when she was six months old, she used to grab a block with her whole hand. now at the age of ten months, she can grasp the same block with her thumb and forefinger. this sequence of growth in her hand and finger movements is according to the pattern.

How do antiviral drugs work? in your own words.