Question

How plant helps soil as interaction between plant and soil is called as symbiotic relation.

Answer 1

Interaction between two different organisms living in close physical association, typically to the advantage of both is called symbiosis.
In the forest and the prairie, the roots of plants help hold the soil together. This reduces erosion and helps conserve the soil. Plants also help make soil. Soil is made up of lots of particles of rocks which are broken down into very small pieces. When plants die, their decomposed remains are added to the soil. This helps to make the soil rich with nutrients.