Donna-Lynn is preparing a visual display of psychology's early history. One panel is headed "The Gay '90s." It portrays developments in the 1890s. Another panel is titled "The Roaring '20s." It is devoted to the 1920s. Which theoretical perspectives in psychology should appear in each of these panels?

"Gay '90s" : functionalism

"Roaring '20s" : Gestalt psychology

Explanation:

Functionalism and Gestalt psychology are the two theories of psychology.

Functionalism highlights the theory of mental states of the individuals. In this theory, the constitution of the mental states are not focused, rather their functions are focused.  

Gestalt psychology highlights on the completeness of the things. This theory focuses on complete things rather than individual or its parts.

it would be d). more resources must be obtained to attain that combination of goods and services

  b.

there are isolated pockets of farming, generally around rivers and oases, which are used for irrigation.