In this task, you are given a question and answer for that. The answer will fill in the blank or will complete the unfinished question. Your task is to provide an explanation based on the given question or fill-in-the-blank statement, and answer.

[EX Q]: Question: Mary and Clare go to the beach. Mary uses a sunscreen with SPF 45. Clare uses a sunscreen that has an SPF of 20. Who skin will be protected less? 
 Answer: Clare
[EX A]: A sunscreen with a higher SPF protects the skin longer.

[EX Q]: Question: If Milo is adjusting the strength of his microwave in the kitchen and he sets it to a lower frequency, does the energy output of the microwave 
 Answer: decrease
[EX A]: With higher frequencies, the microwaves also have more energy.

[EX Q]: Question: Keith is showering, and is washing himself using a bar of soap, and then again with a loofah. Keith's skin will get worse exfoliation, due to the lesser friction, when he washes his body using the 
 Answer: soap
[EX A]:
Friction is greater when objects have rougher surfaces or are heavier so they press together with greater force.