Questions

Deep sea animals cannot produce food as there is no light. They have to depend upon the fall out of organic debirs raining down on them from surface layers. Hence they are detritivores.

Sad means being unhappy, sorrowful, mournful, wistful,...

Hence, Somber means cheerless i.e, unhappy which is synonym of sad. All other options are opposites of Sad.

Endorphins are called pain controlling chemicals in the body.

The computers microprocessor speed depends on all the factors like clock speed, bandwidth and the number of instructions it processes.

Nine in total. 6 daughters and a brother in common, 2 parents.

True, the greenhouse effect is caused solely by human activities such as deforrestation, depletion of natural resources and emission of CO2 by using vehicles, refrigerators and AC's.