What percent of the weight of a typical animal is oxygen?

There are six elements that make up most of the human body. which of the following is not one of these six elements?

Plz ! ive been stuck on this forever

Which phrase is the best summary of the model shown? a. the transfer of the sun's energy through trophic levels b. a series of aerobic and anaerobic reactions c. a transformation of light energy into chemical energy d. the breakdown of food molecules