Question

What id ment by geotropism and hydro tropism

Answer 1

The movement towards the gravity is called geotropism
The movement towards the presence of water is called hydrotropism

Answer 2

Hydrotropism is a plant's growth response in which the direction of growth is determined by a stimulus or gradient in water concentration. A common example is a plant root growing in humid air bending toward a higher relative humidity level.

Gravitropism is a coordinated process of differential growth by a plant or fungus in response to gravity pulling on it. Gravity can be either "artificial gravity" or natural gravity. It is a general feature of all higher and many lower plants as well as other organisms.