Cystic fibrosis and sickle cell diease
The answer would be the troposphere
Carrying capacity is the paramount number of a particular species that the earth or ecosystem can hold while limiting factors are the biotic and abiotic factors that confines or limits the growth of the living organism.
More the amount of limiting factor, greater will be the number of growth of the organism as the raw materials to hold life would be enough to sustain these many number of organism. Therefore, limiting factor governs the carrying capacity of various organisms on earth.
This is false-- Primary producers are near the base of the pyramid because they get their energy right from the sun.
I hope this helps :)