Describe and explain the purpose of phototropism and gravitropism in plants and explain why this feature is important for the survival of plants (6 marks) QER question so marks for spelling etc too but if anyone has bullet points of things to include that would be great! :)

Plants have a variety of developmental, physiological, and growth responses to light—sometimes only to particular wavelengths of light.

In phototropism a plant bends or grows directionally in response to light. Shoots usually move towards the light; roots usually move away from it.

In photoperiodism flowering and other developmental processes are regulated in response to the photoperiod, or day length.

Explanation:

there are some key points, hope that helps :)

they had the law tat factories that produces smoke cannot be built near residential buildings.

building of proper sewage system was done to ensure that the waste is carried away from the humans so that they do not get diseases from it.

also they built water systems to provide water in those areas which are drought prone.