Some thermal containers have layers of materials to keep drinks cold for as long as possible. Which design would help keep ice frozen for the longest period?

the arctic is a region of the planet, north of the arctic circle, and includes the arctic ocean, greenland, baffin island, other smaller northern islands, and the far northern parts of europe, russia (siberia), alaska and canada.

the answer is c. the lower legs are levers, and the knees are fulcrums. the ankles hold the loads.