Answer:
2. it can identify people who have been in contact with an infected person
you chooses right
The glands of the endocrine system secrete hormones into the bloodstream to maintain homeostasis and regulate metabolism.
It can help you keep track of your fitness.
The answer is B. chemicals.
the reason its b is because A= bacteria but u have to clean the bacteria in the water so its not A and its not c. becouse that will be just turning the ice into water .so the answer is b. becouse we use chemicals everyday to get rid of bacteria and waste
