In this task, you are given a sentence and a question, you would be asked to create the answer which is contained in the sentence provided.

Sentence: Nonmetals have the highest attraction for electrons. Question: What elements have the highest attraction for electrons?
nonmetals

Sentence: Natural selection works by selecting for alleles that confer beneficial traits or behaviors, while selecting against those for deleterious qualities. Question: What works by selecting for alleles that confer beneficial traits or behaviors, while selecting against those for deleterious qualities?
natural selection

Sentence: Acids are associated with a low number on the ph scale. Question: Acids are associated with a low number on which scale?
ph