Respuesta :

nsamalot1

Answer: rivers often contain harmful microorganisms such as viruses, bacteria, and parasites

Explanation: if ingested, it can cause plenty of illnesses including giardia and dysentery

bhattaliniya12

Answer:

because it's very unhygienic. nowadays, rivers are polluted , too. if we drink the water from a river without filtering and boiling then many germs and bacteria will enter our body which will make us sick and even lead to harmful or deadly diseases.

Explanation:

hope it helps u..