The hypothesis the evolution occurs at a slow constant rate is known as
a slow-motion
b-adaptation
c- slow motion
d gradualism

D. Gradualism

After a while organism will become more uniform and thus evolutions began to slow down.

Example: humans

try using substitution:

x + y - 6 = x - y. (i'm not giving you the exact answer). since 0 = x - y, then sub 0 in the equation with x - y. combine your like terms, and then use inverse operations, and you'll have your answer.

: -)

so whats the answer