Aristotle believed that something called the "visual flux" flowed out of eye, bounced off objects, and then returned to the eye, and that this was the basis of eyesight. how did he explain the fact that it gets dark outside at night? a, the sun is not in the s ky. b. the eye puts out less visual flux at night. c. fewer people are active at night so there is less visual flux about. d. night air is opaque because nights are cooler.

Amath expression is a collection of one or more terms, which are separated by the signs ( + , - , x , / ).example :   8+b8+b  or  a−3a−3in algebra, an equation is a mathematical statement with two expressions where, each expression is separated by an equal (=) sign. variables can be present on both the sides of the equality (=) sign and we use letters to denote such variables.example 1:   x=4+2x=4+2  , [here, we can observe that the variable is present only on one side of the equation].example 2:   2x+3=x+42x+3=x+4  , [here, we can observe that the variables are present on both side of the equation].

Why you put last one a? i think is b.

The correct answer is:   [b]:   "distortion" .