Two factors that drive natural selection are listed below.

1. Percentage of young that survive
2. Ability to produce offspring

Which statement is true about the two factors?

Factor 1 causes genetic variation and factor 2 causes differential reproductive success.
Factor 1 causes differential reproductive success and factor 2 causes genetic variation.
Both factors cause differential reproductive success.
Both factors cause genetic variation.

from the word list given, the most suitable words that relate to the reason information were written would be:  

objectivity: lack of bias, judgment, or prejudice

accuracy: free of mistakes, to be correct

authority: the ability to tell people what to do or believe in

content: to be satisfied  

it can be said that the author made the article to present objectivity, to provide accurate information, to be the authority in the subject that he or she writes, and to be satisfied of the information quality given out.

answer; blank(1); surveys; blank(2); experiment;