What do environmental influences such as parental styles, physical surroundings, and economic issues refer to in the process of development?

Which of the following is an example of cognitive dissonance?

a) You are a lousy cook but you keep trying different recipes. b) You believe that reality TV is for morons but are addicted to American Idol and watch every episode. c) You dislike doing exercise but do it anyway to improve your health. d) You are polite and civil to people you dislike.

__________ is the type of twins which occurs due to a single zygote that splits into two

Fill in the blanks with correct word