निम्नलिखित में से कौन-सी विशेषताएं ध्रुवीय भालू को अत्यधिक ठंडी परिस्थितियों में अनुकूलित होने में मदद करती हैं?

Read the following statements about tropical rainforests and choose the correct option: Statement (I): They are highly suitable for supporting an enormous number and a wide variety of plants and animals. Statement (II): Because these forests have ample food and shelter for all animals, there is no competition among them for resources.

Given below are two statements. One is labeled as Assertion (A) and the other as Reason (R). Assertion (A): Polar bears have only a single layer of thick fur. Reason (R): The fur of polar bears protects them from extreme cold.