The development of organs and tissues from a zygote includes

mitosis and differentiation

Explanation:

During the early stages of development, the cells that are formed by MITOTIC division (mitosis) begin to undergo DIFFERENTIATION, which simply means that they become different from one another. This leads to the formation of specialized cells, which form the tissues, and then the organs, of multicellular organisms.

thinking it would be d not too sure but i think it's right

in 1859, charles darwin set out his theory of evolution by natural selection as an explanation for adaptation and speciation. he defined natural selection as the "principle by which each slight variation [of a trait], if useful, is preserved".