Plants grow around this lake. plants also grow in this lake. all but one non-living feature is important to the life of the plants around and in the lake.   a) carbon dioxide.   b) water temperature.   c) amount of sunlight.  d) the depth of the water.

C) amount of sunlight.

Explanation:

Plant are the most important living thing present on the planet earth ,

as they provide the living organism the most important unit for their survival , i.e. Oxygen gas .

Plant have the capability to produce oxygen gas , by the help of certain basic  things , sunlight , water and carbon dioxide .

Hence , as the gas and water are available every where , the sunlight is very important for the growth of plant .