What is a common way for an author to introduce an important idea or central concept?(1 point) by elaborating through adding details about the topic by starting with an interesting fact or detail about the topic by providing anecdotes showing examples connected to the topic by illustrating different features or components of a topic

by elaborating through adding details about the topic  

Explanation:

When an author decides to add an important idea or a central concept to his text, he should look for statements that support and facilitate the reader's understanding of that idea and concept. This is done by adding details about the topic that was dicutive. These details must be harmonious with the topic, coherent and cohesive, to achieve the objective that they propose to achieve.

a line graph will be best to show the income.

if its apex this should be the correct answer

war information to be released publicly must first be deemed useless to the enemy