Plz solve anyone.

When a septic tank backs up a goes in to clean it out

An animal cell loses the ability to convert energy stored in food to energy that the cell can use. which of the cell's organelles has stopped working? a. the mitochondria b. the nucleus c. the vacuoles d. the endoplasmic reticulum

At stp, which substance is the best conductor of electricity? a. nitrogen b. neon c. sulfur d. silver