I need help asap pls help

Acceleration is a direct result of a.) balanced forces b.) unbalanced forces c.) gravity d.) velocity

What is true of all organisms in the kingdoms protista, plantae, fungi, and animalia? a. they are multi-celled. b. they are photosynthetic. c. they have cells that contain membrane-bound organelles. d. they contain cells that lack membrane-bound organelles.

Any sound above what db can cause hearing loss in human beings