Aquatic plants have the ability to loat rather than being submerged in water. How?

Question

Aquatic plants have the ability to float rather than being submerged in water. How?

Answer 1

The ability to float rather than being submerged in water in aquatic plants comes due to the presence of a special tissue called aerenchyma which is a subtype of parenchymatous tissue. In this tissue large air cavities are present between parenchyma to give buoyancy to the plants which help them to float rather than being submerged.