Which of the following summarizes the main idea in paragraph 5? PLEASE HELP WITH THIS QUESTION

Paragraph 5 Says: Traits that are helpful in warm water may not be needed in the Arctic Ocean. Populations of a species living in different environments will develop different adaptations. For example, the ability to easily lose extra body heat would be helpful in a desert. This trait would be harmful in the Arctic. The camel's hump stores extra water for life in the desert. The hump would not be helpful to a rainforest monkey. Our environment will always change. Most of these changes take hundreds of years to occur. Scientists study the traits that have survived for hundreds of years. These adaptations show the power of short- and long-term environmental changes. They have shaped the world we live in today.