The answer is C, chromatid
Considering the attached figure; the functional area of the kidney at letter b; is the Renal pyramid.
Kidney pyramid or renal pyramid consist of tubules that transport urine from the cortical, or outer part of the kidney, where the urine is produced, to the calyces, or cup-shaped cavities where the urine collects before passing to the bladder through the ureter.
Explanation:
Terrestial Animals - Animals which can only live on Land.Examples:- BEAR- CAT- DOG- DEER
Aquatic Animals - Animals which can only live on Water.
Examples:- FISH- OCTOPUSES- LOBSTERS- SEAHORSE
Amphibians - Animals which can live both on land and on water.
Examples:- FROGS- TOADS- SALAMANDERS
Arboreal Animals - Animals which live primarily on trees.Examples:- SQUIRREL- RODENTS- CHAMELEON
Capillaries: <span>any of the fine branching blood vessels that form a network between the arterioles and venules.</span>