Suggests that children are active learners who essentially socialize themselves.
1) Gender schema theory
2) The autobiographical author
3) Theory of mind
4) Social learning theory

gender schema theory

Explanation:

pregnancy happens more and more

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".