What is the effect of sickle-cell anemia?
a. Blocked respiratory pathways.
b. Decreased neurological functions.
c. Inefficient oxygen transportation.
d. Susceptibility to contracting malaria.

Option C.

Inefficient oxygen transportation.

Explanation:

Sickle cell anaemia is an inheritable condition in which the red blood cells cannot carry oxygen to the organs or whole body because the red blood cells shape has been distorted and is sickle in shape. In this condition there is not enough red blood cells to carry oxygen in the blood.

Red blood cells function to transport oxygen in the blood because of the haemoglobin molecule present in them.

This can damage the organs nerves,lungs, livers spleen e.t.c

what's the question?

explanation:

for  example, forests have higher evapotranspiration than other ecosystems,  such  as grasslands, because of their deeper roots and greater leaf area. thus forests have a net moistening effect on the atmosphere and become a moisture source for downwind ecosystems.