Question

how do kelp plants grow in the water? they start growing on land then move to water. they root at the bottom and grow upwards. they anchor to the bottom of ships. they float on the surface of the water.

Explanation:

Kelp are large brown algae that root at the bottom of the ocean (seafloor) and grow upwards towards the surface where they can access sunlight for photosynthesis. They do not start on land, do not anchor to ships, and do not float on the water - surface in the way described for this question.

Answer:

They root at the bottom and grow upwards.