A correlation cannot be used to determine whether children who are friendly are also smart. honesty in school is related to honesty at home. intelligence is related to friendliness. honest children have honest parents. TV violence causes childhood aggression.

Option E

Explanation:

Correlation and causation studies are two different things. Co-relation is a simple representation of relationship between two subjects A and B. It does not mean that A will be caused because of B or B will be caused because of A.  

However, causation connects two variables “cause and effect.” The case of negative impacts produced by TV during childhood stage is more a cause and effect relationship than a co-relation

Hence, option E is right answer

i'm thinking (a) to keep sand in place; ////////////

explanation: a sand fence or sandbreak, like a snow fence, is used to force windblown, drifting sand to accumulate in a desired place. sand fences are employed to control erosion, sand dune stabilization, keep sand off roadways, and to recruit new material in desert areas.