This Is a Certified Answer

Certified answers contain reliable, trustworthy information vouched for by a hand-picked team of experts. Brainly has millions of high quality answers, all of them carefully moderated by our most trusted community members, but certified answers are the finest of the finest.
There are tissues called parenchyma. In water plants these tissues have large ari spaces in them which provide bouancy and help the plant to float on water.
1 2 1
Water hyacith floats on the water due to presence of arial parenchymatous tissue. this tissue contians large amount of air spaces in them which make it float on the water