Answer: The water temperature.
Explanation:
The abiotic factors are the non living factors that helps in the growth and development of the plants and animals.
The physical conditions that favors or inhibits the growth of the organisms are the non living components around them.
Example: soil, air, temperature, atmospheric gases.
Here, the water temperature can be one of the important components that can control the growth of plants in water.
The correct answer is option A