Hypotension, distended neck veins, and muffled heart sounds are classic manifestations of a. congestive heart failure (chf). b. cardiomyopathy. c. cardiac tamponade. d. myocardial infarction.

  The fish moves up the river to spawn, a walrus stays warm in the cold ocean are the results of an organism having lipid in its body.

Explanation:

The fish have energy deposited in the form of fat or lipids, they do not feed during spawning and gets energy from the fats.

A walrus has good insulation of fat layer over their bodies as they live in the arctic region. The thick layer of lipid/ fat helps it to survive in freezing temperatures.