Which is an immune response? the iris of the eye narrows when the eyes are exposed to bright light. langerhans cells transport harmful substances to white blood cells. muscles under the skin contract rapidly to adjust the body's internal temperature. t cells signal b cells to adjust the ph of the blood.

Langerhans cells transport harmful substances to white blood cells.

Explanation:

Langerhans cells are also called as Intraepidermal macrophages and are present in epidermis of skin. These cells initiate the immune response against the microbes that enter skin by serving as antigen presenting cells. These activated immune cells help the other white blood cells of immune system to recognize the entered pathogen and to mount the response against it.

covalent bonding is a form of chemical bonding between two non metallic atoms which is characterized by the sharing of pairs of electrons between atoms and other covalent bonds.

it's c. (to reduce the greenhouse effect/carbon gasses)