When you lean against the wall, there is an equal and opposite force exerted on you by the wall.
O Newton's First Law
O Newton's Second Law
O Newton's Third Law​

Respuesta :

Answer:

Newton's 3rd law

Explanation:

When you lean against the wall, there is a contact made between you and the wall, so whenever contact comes into play, normal reaction force always exist, so that makes up action-reaction pair.. so it's Newton's third law!!