What do cuticles do for land plants that was not necessary for ancestors that lived in water?

Question

Cuticles allow them to grow bigger and taller.
Cuticles help them transport water.
Cuticles help prevent water loss.
Cuticles allow the performance of photosynthesis.

Answer 1

Cuticles help prevent water loss.

In land plants, the cuticle is a waxy layer covering the epidermis of leaves and stems that helps reduce water evaporation, which is crucial since terrestrial environments can lead to greater water loss compared to aquatic environments where ancestors of land plants lived.