Answer:
describe the innovation and advancement of movies over time.
behavior, language, customs and values
<span>A central or a main idea is an idea around which your entire paper or essay or paragraph or whatever it is you're writing, revolves. You have a central idea that you're trying to convey and everything you write or say somehow relates to that idea and proves a point that you're trying to make.</span>
Main Idea: The main idea is that tigers are going extinct but now acts are being done to help this from happening.
SD1: "A study released that the world's wild tiger population has risen for the first time in century"
I can't figure out the other 2 details.
Sorry.
