I think 1 is B but not so sure about 2
Answer:
Explanation:Sometimes memories of loss or of a lost loved one may light up the reward receptors in the brain. This means that moving on or “letting go” can be much more difficult.
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