Which theme does leo tolstoy explore in this excerpt

Essay about how to keep environment clean and safe?

Plz ! i genetic mutation occurs in a rabbits muscle cell this genetic mutation will be passed on to, a. the existing cells in the rabbits body. b. the cells that are next to the mutant muscle cell. c. cells that are produced when the mutant cell divides. d. the cells of the rabbits offspring.

What 3 topics are considering for demonstration speech?