What does the word principal mean as it is used in section 11

Fill in the blank: modernism can be seen in movies with (choose the best answer a. a technological and scientific view b. a fantasy type twist c. an anti-consumerism slant d. a realistic and non-imaginative slant

May someone me with these questions

The function described as consumption and the absorption of energy through photosynthesis is called a. respiration b.energy absorption/food consumption c.excretion d. re-charge