All of the following are environmental factors that affect human development except

a.
chromosomes
b.
healthy eating habits
c.
economics
d.
living conditions

Although chromosomes can affect how a human develops it is not an environmental factor. Environmental factors are conditions that occur outside of the person's body. Chromosomes are internal factors, you are born with a set number of chromosomes and their influence is internal through the genetics.

1. commercial sales2. social media3.movies containing drugs and or parties.