Question

4. microorganism are
O useful
O harmful
O both useful and harmful
O only a is correct
Required​

Answer 1

Answer:

microorganism are both useful and harmful.

Explanation:

useful micro organisms: lactobacillus

harmful microorganisms: clostridium

Answer 2

Answer:

Both useful and harmful.

Explanation:

But not sure yarr..you can see others too... hope it helps you...