Please Help I’ll give brainlist for correct answer Evaluate the expression

If p = 1, r=-7, and s= -2
-3p-21 6+4s

A. -5 1/2
B. -11/3
C. 11/14
D. 4 1/2

where is the r?

Step-by-step explanation:

can u upload a picture of the actual problem? or try rewriting it otherwise im not sure i'll be able to solve it right?

I don't know T^T

Step-by-step explanation:

start with a line segment pq that we will copy. mark a point r that will be one endpoint of the new line segment. set the compasses' point on the point p of the line segment to be copied. adjust the compasses' width to the point q. the compasses' width is now equal to the length of the line segment pq.

step-by-step explanation:

the answer is; biodiversity resulting from few ancestors

adaptive radiation occurs when a population is subjected to a large natural environment with spatial ecological variations. the parts of the population in the different ecologies begin to adapt to their local environments. due to non-random mating across the large populations, this causes the different populations from the large population to speciate within their local environments. they, therefore, diverge to different species sharing a common ancestor.