Answer:
CENTRAL IDEA: The chief point an author is making about a topic; the author's primary message. ... DEVELOPMENT: The building of an idea/ideas throughout a text.
Formulating a Central Idea Statement
Here are two examples: Specific Purpose – To explain to my classmates the effects of losing a pet on the elderly. Central Idea – When elderly persons lose their animal companions, they can experience serious psychological, emotional, and physical effects.