For the acronym SLANT,the s stands for what?

The S in SLANT stands for "Sit up straight".

The acronym SLANT is often used in educational settings to promote active listening and engagement. Each letter stands for a different aspect of active listening. In this case, the "S" in SLANT stands for "Sit up straight." This means that when you are actively listening, you should sit in a posture that shows you are attentive and focused.