Not friendly characteristic of an enemy
A Efficient
B Contaminate
C Hostile
D Vow

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.

what book are we talking about here

conclusions made on the basis of unstated or stated evidence are called inferences