What is the difference between theme, topic, and main idea?

all appreciated, you so much!

theme is the central idea/lesson of a piece of literature

Main idea is a general summary of what the work is about

A topic is a point or idea the author is expressing throughout a piece of literature

h it's isaac again my bad i just seen this and i was like hey she's a fwend but yeah wussup

the unsaturated fatty acid is a fat consist of one or more double bond in the fatty acid chain. if it contains one double bond then called as monounsaturated fatty acid however if, it contains more than one bonds called as a polyunsaturated fatty acid. true fatty acids are called unsaturated fatty acids as it reduces the risk of high blood cholesterol and good for health.