Question

Flexible leaves,air spaces in stems and leaves

Answer 1

leaf -a soft area of plant and stem- a thin part of a plant

Answer 2

Hydrophytes or aquatic plants have flexible leaves to move with water current, otherwise they will break. Certain aquatic plants have air spaces in stems to hold the leaf above surface of water. These plants have special type of parenchyma called aerenchyma (having air-spaces).