Decide which vocabulary word or related form best completes the sentence, and write the letter of your choice on the answer line.
?
1. The old adage "Two heads are better than one" is an example of
a. diffusion
b. synergy c. parity d. periphery

summary - a brief statement or account of the main points of something.

main idea - the main idea is defined as the main point of a speech or piece of writing.

paragraph - a distinct section of a piece of writing, usually dealing with a single theme and indicated by a new line, indentation, or numbering.

we need more information in order to answer.

. a function is a relation in which each input has only one output. in the relation , y is a function of x, because for each input x (1, 2, 3, or 0), there is only one output y. x is not a function of y, because the input y = 3 has multiple outputs: x = 1 and x = 2.

the answer to the problem is most likely a