Ap environmental science!! Will mark brainliest if correct! 2 questions shown in pic

Which of the following refers to treating all patients or first aid victims as a potential source of bloodborne pathogens by taking all precautions to prevent contamination?

According to the nebular theory, the planets formed from a process called . after our protosun formed, remaining dust and gas from the nebula collided, combined, and gravitated together to form the planets.

Which of these is a lower subgroup a. kingdom b. order c.genus d. species