What is the definition of social identity?

An individual's social identity indicates who they are in terms of the groups to which they belong. Social identity groups are usually defined by some physical, social, and mental characteristics of individuals.

Explanation:

it is due to the halo effect as the impression of the boy created earlier.on the mind of the principle affected his decision

d. the polar jet stream   lies between the polar easterlies and trade winds should be your answer