In what process do bacteria break nitrogen gas down into a usable form for plants?

a. fission
b. decomposition
c. conjugation
d. nitro fixation

option a and d is the correct answer

i hope this u

plz mark as the brainliest answer

when you breathe in, or inhale, your diaphragm contracts (tightens) and moves downward. this increases the space in your chest cavity, into which your lungs expand. the intercostal muscles between your ribs also enlarge the chest cavity. they contract to pull your rib cage both upward and outward when you inhale.