Case study seeks to understand the particular case because it represents an unusual situation

Case study seeks to understand the particular case because it represents an unusual situation or events or peoples who have rare psychologically abilities and disorders. It is an small scale representation of large fact.

Explanation:

Case studies refers to small scale spatial analysis of a particular event. In research methodology it is a well known methodology. Ina vast research area for depicting some sorts of result in concrete way case studies are taken frequently. For e.g. someone is studying arsenic contamination in ground water at West Bengal. Now this is a large and macro scale study.

For analyzing or applying all the techniques to perfectly measure the result one has to do micro level study. For that reason we can take a case study of a community development block. It will be more authentic and practical then.

the rebels’ chances of victory at lexington & concord were fairly slim, given the fact that most of them very untrained and they were up against the world's greatest military force.  

there are no options provided but you can choose among the following gender-neutral pronouns: zir, hir, eir, vis, tem, eir.

in the normal course of maintaining a pronoun-antecedent agreement, we could have used the words his or her but since we are also required to use gender-neutral language, we need to replace it with its equivalent gender-neutral pronoun.