Leela just covers her eyes when Ria flashes torch light on her. What is this response? Define the same.

Explanation:

We close our eyes when large amount of Light falls on it. This is because the presence of rod cells and cone cells in the eyes. ... Rod cells are also called as Photoreceptor cells and it controls the amount of light in less visibility while Cone cells controls the amount of light in High visibility.

sulfur dioxide

explanation: acid rain is caused by a chemical reaction that begins when compounds like sulfur dioxide and nitrogen oxides are released into the air. these substances can rise very high into the atmosphere, where they mix and react with water, oxygen, and other chemicals to form more acidic pollutants, known as acid rain.

the menstrual cycle – higher tier. negative feedback mechanisms affect the production of hormones in the menstrual cycle. oestrogen also stimulates the release of lh (luteinising hormone) from the pituitary gland, which in turn controls the production of progesterone.