The group in society made up of the unemployed who can be put to work during times of high production and then laid off when they are no longer needed is called

Seasonally unemployed group

Explanation:

This group consist of people who are considered 'naturally' unemployed because of regular changes in the seasonExamples  include construction workers who are hired mainly in the summer and laid off in the winter,  ice cream vendors whose peak season is the summer and off-peak, the winters.

answer: a. the kind of population living in your neighbourhood.

the census explorer data tool by the us census bureau allows the user to zoom in on any neighbourhood within the united states and find the kind of people residing in that by race and age.  

the tool needs to needs to be used twice – once in order to find what type of people reside in a neighbourhood, and then to see the age groups of the people in the same neighbourhood.