How does mother-child imagery work in images to make them more effective?

: How does mother-child imagery work in images to make them more effective?
For English, I need to answer this question. It seems really simple, but I can’t come up with a page worth of material for it. The whole question is:
Examine traditional Christian imagery, cultural images of mother and child, and Dorothea Lange’s migrant mother photo. How does the mother-child imagery work in these images to make them more effective?

Answers and Views:

Answer by pioneer
start by defining what makes an image “effective”? Some images ae random (without purpose). Others are created to get the viewer to react in some way, and/or to convey a wordless message.