What is the best definition of an essay?
a. an exploration of ideas
b. a historical narrative
c. a call to action
d. a factual document

A). An exploration of ideas.

Explanation:

An essay is illustrated as the written piece of work that involves expedition of a specific topic or subject which is often accomplished by the inclusion of the author's personal remarks based on his/her opinions or point of view.

As per the question, an essay could be regarded as the 'exploration of ideas' which is inclined towards analysis and interpretation to present a detailed argument with a conclusion(including authorial remarks). It could be either formal or informal with each having a purpose to serve. It is chiefly inclined towards exploring a specific idea in different aspects that aids to examine and evaluate these aspects that how each aspect contributes to the whole. Thus, option A is the correct answer.

uncanny would be like unlucky or disaster. you can look for more in the dictionary or if you have text book then turn to a. 17 but it's different with textbooks.