Which word could replace trouble without changing the meaning of the selection

Heres a few synonyms:
If its the trouble where you’re having difficulty or problems: (im having trouble doing this work) you could say something like difficulty or problems

if its where its somebody causing a disorder: (he is causing trouble) you could say disturbance

if it’s where its troubling someone: (this had been troubling her for some time) you could say bothering, bugging, concerning, disturbing, annoying, irritating, etc.

*with our without suffixes depending on the way the sentences are worded but its really obvious* :) <3

Answer and explanation

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.