According to the Young-Helmholtz theory color vision depends on pairs of opposing retinal processes:.1. The retina contains three kinds of color receptors. 2. Certain nerve cells in the brain respond to specific features of a stimulus. 3. The size of the difference threshold is proportional to the intensity of the stimulus. 4. The optic nerve processes top-down stimuli.

1. The retina contains three kinds of colour receptors

Explanation:

Young-Helmholtz theory color vision says human can perceive colour due to the presence of colour receptors in the retina that receives colour in various wavelengths

answer is b

  a   having low self-esteem

  b   having abusive family members

  c   having poor school attendance

  d   having friends who discuss gang life

living torture and being abused makes one not mind harming other people.

and also not being supported and abusing one turns one into this state.