Ais a substance which alone or in combination with other chemicals stimulate the growth of cancer.

Combination therapy, a treatment modality that combines two or more therapeutic anti-cancer benefits, such as reducing tumour growth and metastatic potential, agents initially used for the treatment of different diseases other than cancer. Newer approaches that do not rely solely on a single agent's

Explanation:

the answer is false, i know this answer is late but its for anyone else that needs it.

because health skills are tools and strategies and also practical skills are also something you need to learn (like tools and strategies) and put it in reality.