Answer: They are marine plants.
Explanation:
Hi, kelp and seaweed are similar because they both are marine plants.
They can be found in ocean waters all over the world. They are also very nutritive, containing a lot of vitamins, minerals, and nutrients that make a diet very healthy.
Seaweed is a more general term, and often kelp is categorized as a large seaweed.
Feel free to ask for more if it´s necessary or if you did not understand something.
