Step "s" stands for:
identifying the problem
listing choices
judging whether or not your choice is right
developing a plan of action

The answer is: identifying the problem

During this stage, we need to observe the situation that we had at hand and try to analyze what cause it. Only After we get this part done, we can formulate the proper planning that can be executed to tackle the problem and improve our situation.

since you have not provided the options here i   am going to give you general overview about hormone.hormone are actually the part of endocrine system in our body and produced by the endocrine glands. the hormones act like a chemical messenger   within human body. once produce by the glands they   travel through the blood stream and reach at specific or target tissue and organs   which result in control of our body function. the hormones are specific in their work and work on only the targeted tissue or organ   . with the of hormone endocrine system regulate the heart rate , metabolism, our mood and   growth as well as the development and even the sleeping cycle etc. they actually are the messenger for body cell and organs .