Question

besides being a shelter and food source for many different species, kelp forests benefit humans in many ways. by creating drag and decreasing wave action onshore, kelp forests protect coastal communities from shoreline erosion. kelp forests are also home to a number of recreationally and commercially important fishery species, such as kelp bass. additionally, these biodiversity hubs attract many tourists, who dive or kayak among the kelp and pour money into local businesses. back on land, kelp is an important economic resource to humans. people eat it and use it as fertilizer, and it shows promise as an alternative energy source. algin, a polysaccharide derived from brown kelp, is used as a thickening and gelling agent in foods and pharmaceuticals. algin is even used for waterproofing and fireproofing fabrics. kelp forests also play a role in climate regulation. they remove carbon dioxide from the atmosphere through photosynthesis. kelp absorbs carbon dioxide during growth and stores carbon in its biomass. when the kelp dies, most of its carbon content is then transported to the ocean floor, where it can be sequestered away from the atmosphere for centuries or longer. how do humans benefit from kelp forests? select all that apply. compounds derived from kelp have medical and industrial applications. kelp forests reduce coastal erosion. kelp forests play a role in recreation and tourism. kelp forests support commercial fisheries by providing habitats for important fishery species.

Explanation:

The text mentions that algin from brown kelp is used in foods, pharmaceuticals, waterproofing and fireproofing fabrics (medical and industrial applications). It states that kelp forests create drag and decrease wave - action to protect from shoreline erosion. They are home to important fishery species and attract tourists for recreation.

Answer:

Compounds derived from kelp have medical and industrial applications.
Kelp forests reduce coastal erosion.
Kelp forests play a role in recreation and tourism.
Kelp forests support commercial fisheries by providing habitats for important fishery species.