Answer:
Large states providing security for trading networks.
Answer: C
Explanation: crowdsourcing is when people / organization help out an application or network therefore c is the best example of that
For this case we have that by definition, a linear function is of the form 
If we have that a and b are linear functions, then they are of the form:

If we multiply them we have: (Applying distributive property)

That is, we get a quadratic function.
Answer:

When the rubber band is released energy is converted into kinetic.
Answer:
theme gives readers better understanding of main characters conflict , experiences discoveries