Fill in the blank A(n) is a group of organisms that can mate and produce offspring that can mate. It’s an example word not sentence

i need mutiple choices

> b takes place in the gas phase in an isothermal tubular reactor. the feed is one mole of a per one mole of c, an inert. the entering temperature and pressure are 427°c and 10 atm, respectively. the gas constant r = 0.08206 atm · l/mol · k.

i think it's letter a.

the answer is a for sure mark brainliest i had got this right on usatestprep