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.

Question: When a device become less efficient, its production of usable energy will go 
 Answer: down
The more efficient a device is, the greater the percentage of usable energy it produces.

Question: As we go further from shore, we normally will encounter _____ dissolved nutrients. 
 Answer: less
Therefore, water nearer shore usually contains more dissolved nutrients than water farther from shore.

Question: If there are fewer bacteria with the right mutation, will the occurrence of the mutation become 
 Answer: less

Bacteria with a mutation the helps resist antibiotics increase in numbers, so the mutation becomes more common.