Which two sentences in this excerpt from John Steinbeck's "Symptoms" address the theme of soldiers being reluctant to talk about their experiences in war?

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.

nambe vazhkaile elam nala irukum

the answer is clear boy