The stomach secretes the hormone ghrelin which functions to

The correct answer is: increase appetite.

Explanation:

Ghrelin is a hormone secreted by the stomach with two main functions: increase appetite and stimulate the release of the growth hormone.

Ghrelin is called the "hunger hormone" because it stimulates the ingestion of food and the storage of fat by traveling through the bloodstream (like all hormones) to the hypothalamus, which is a region in the brain that controls appetite. To stimulate the release of growth hormone, ghrelin also reaches the pituitary gland.

Other functions of this hormone include protecting the cardiovascular system and controlling the release of the hormone insulin.

The correct answer is B.Their numbers have increased because of the Endangered Species Act and E.They are an example of protecting biodiversity through the passage of laws.

Explanation:

Gray whales are nearly 45 meters long baleen whales live in the pacific ocean. Gray whale species were on the line of extinction due to overhunting or whaling in the mid 90's but due to the protection given under Endangered Species Act, its number increased now to 25,000 and in 1994 it was removed from endangered species list.

Endangered Species Act's purpose is to protect those animals and plants which are at the risk of extinction and increase their number in the wild. It is the strongest law implemented to save biodiversity.  

So gray whale species have increased due to the Endangered Species Act which is an example of protecting biodiversity through the passage of laws. Therefore the correct answer is B and E.