What people need in order to be happy is the concern of a psychologist working in which field?

The answer is the field of humanism and positive.  Humanistic and positive psychology both focus on similar concerns but have variances regarding methodology and epistemology. In terms of methodology, humanistic psychologists tend to prefer qualitative over quantitative styles, whereas positive psychologists tend to hold the opposite preference.

Humanistic or positive

Explanation:

Ape x

first, the romans stayed isolated because they had to defend their own territories from neighboring cities that were harassing them, like the etruscans. second, once the romans managed to defeat their neighbors, and started to expand their territory, they started to build roads and bridges. finally, now that the romans have covered their territory with roads functioning as highways, they could mobilize their legions faster to assemble larger military units in a specific place

answer; protectionism fosters competition and keeps price regulated;