Read the incomplete quatrain. The waves recede, and I am left alone They soon return, imploring me to stay I stand and watch though all my hopes have flown Which line completes the quatrain’s rhyme scheme? My vigil lasts ’til every stone is thrown The shore’s a backdrop for my lonely day My feet are buried treasures on the shore The waves remind me it’s not time to go.

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.

a)   it explains that many people died because medicines and medical practices were not effective.