These are the most frequently used words in this book.
adults
age
american
among
another
baby
behave
behavior
believe
better
between
born
boys
category
chapter
child
childhood
children
chimpanzee
come
culture
differences
different
does
effects
environment
even
fact
family
father
find
first
found
friends
genes
genetic
get
girls
give
go
good
group
high
home
human
kids
kind
know
language
learn
less
life
likely
little
live
look
may
members
might
mother
neighborhood
new
nurture
often
older
ones
others
own
parents
part
peers
people
personality
play
reared
relationships
researchers
results
school
see
siblings
social
socialization
societies
something
study
take
teacher
tend
themselves
things
think
though
time
turn
twins
two
use
want
years