Answer:
Females with nurturing characteristics are valued for their tendency to help children survive.
Explanation:
The primary aim of nature during evolution was to increase the number of offspring . It created gender difference to achieve that objective . It created males with more aggressive features so that they can fight other males to gain access to better bred females, a symbol of higher fertility . Females prefer a partner who are mighty and who can give her protection due to their demands of pregnancy and breastfeeding.
Answer:
A manipulated variable is the independent variable in an experiment. It's called “manipulated” because it's the one you can change
(A) Increases the likelihood of aggressive behavior.
source https://mobile.nytimes.com/2013/02/12/science/studying-the-effects-of-playing-violent-video-games.html?pagewanted=all&
"A dose of violent gaming makes people act a little more rudely than they would otherwise"