How do scientists know that dark matter exists? A) It’s heat raises the temperature of space.

B) Its gravity affects objects around it.

C) It gives off electromagnetic waves.

D) All of these.

The answer should be (B)

Hey there! something that is given up as the result of a choice is referred to as  a decisionwhen you have a choices that are being refereed, this would mean that this would be a decision.~jurgen

The answers: [a], [b], [c], and [d].   {but not: [e].}

benefits from increased development include:

[a]: increased access to health care ;

[b]: increased birth rate;  

[c]: increased employment;

[d]: increased wealth.


{note:   but not necessarily:   [e]:   more even distribution of resources}.