"Yet every one of these disasters has actually happened somewhere, and many real communities have already suffered a substantial number of them. A grim specter has crept upon us almost unnoticed, and this imagined
tragedy may easily become a stark reality we all shall know."
Answer:
Anthropology is the study of man
A pacifeist is someone who believes in peace
Some colleges require that each potential student completes an essay.
Subjunctive mood is defined as the verb form used to express a wish, a suggestion, a command, or a condition contrary to fact.
To convert the above sentence into a subjunctive mood, REPLACE REQUIRE WITH PROPOSE.
Some colleges propose that each potential student completes an essay.
In this case, propose means a suggestion.
The word Composed goes best with the word understanding. Hope that helps.