Answer:
Blood vessel growth.
Step-by-step explanation:
Angiogenesis may be defined as the physiological process of formation of new blood vessel from the already existing vessel. Sprouting and splitting are the important process includes in the process of angiogenesis.
The process of angiogenesis occurs fastly in cancerous cells. Important tumor angiogenesis factor called because they stimulate the growth of new blood vessels in the body.
Thus, the answer is blood vessel growth.