Why would tissue from the fetal stage of human development be used to look at mitosis?

Because the fetus has a very high rate of growth, and thus cell division to grow those new cells. So fetal tissue would show a very high rate and amount if mitosis.

**this is one of the reasons that certain medications that inhibit cell division or pathways involved in growth are detrimental to the fetus if taken by the mother during pregnancy.

Explanation:

they each offer a fresh glut of resources to the organisms that can arrive and exploit them. as individuals and new species continue to appear, they actively and passively alter the environment. competition for shared resources increases, local abiotic and biotic conditions shift, and the relative abundances of species change accordingly. the process is called ecological succession, and it is one of the earliest and most well-known concepts in ecology.

i am positive it is c. condensing but i may be wrong