Which statement is sometimes, but not always, true?
a.
a parallelogram is a rhombus.
b.
a rhombus is a quadrilateral.
c.
a trapezoid is a square.
d.
a square is a rectangle.

step-by-step explanation:

how many centimeters did the level of the salsa go down by?

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.