Why don’t mosses grow very tall? They need energy to make food, which they get by being close to the ground.
They don’t have roots, so they must be near water.
They need to send out spores via water.
They have seeds that need to roll away.

Hello~

Llamalover here!

Mosses have some water-conducting cells, but they do not have the empty, lignin-reinforced cells that allow vascular plants to transport water with strong pressure gradients. Thus, mosses have very limited water transport ability and can't grow very tall.

So, your answer is They need to send out spores via water. I believe

Explanation:

Hope this helps!

since there are no options posted i'll give you a few examples.

a dolphin's flipper, bird's wing, cat's leg.