Answer:
si porque si y ya y porque la creta de ti mam me la choa
Explanation:
si
I think the word you're looking for is "hypothesis".
For example, a hypothesis could be "dogs drink more often when owners are present".
And then this can be proven (or dis-proven) by an observation (or in this case rather: measurement).
The answer is D. Just go and look up the definition on google and it will give you your answer.
They determine which stories will receive public attention. Because the media has the power to focus the public's attention on a particular issue.