Polar bears give birth to to club per litter, every three years - what type is the survivorship curve

U not to sure about this would you be able to explain more on what you mean

The answer to your question is that Polar bears are a species of K-strategist animal.

r-Strategist animals include animals that are usually lower on the food chain, such as insects, rodents, and songbirds, while K-strategist animals usually include animals like large mammals, most raptors, and humans, which are either located at or near the top of the food chain.

Hope this helped!

i'm thinking (a) to keep sand in place; ////////////

explanation: a sand fence or sandbreak, like a snow fence, is used to force windblown, drifting sand to accumulate in a desired place. sand fences are employed to control erosion, sand dune stabilization, keep sand off roadways, and to recruit new material in desert areas.