This is an example of 'action' and 'reaction'. Every 'action', like stepping out of the boat on to the shore causes an equal and opposite 'reaction', as the boat moves in the opposite direction. This is also how rockets move in the vacuum of space.
Newton's third law of motion, action and reaction
With less people on board, there's less weight, which cause the boat to float higher.
Stop Imagining!
stop rowing
The most people in a rowing boat is 8 not including the cox.
canoe and rowing boat
rowing/boat rowing
The smallest rowing sweep boat (one oar per person) is a pair with 2 people, one person rowing each side. The smallest rowing sculling boat (2 oars per person) is a single, one person rowing both sides. Source: I am a rower B)
If the boat has an oarsman...a Coxswain.
dinghy,rowing boat,liner,yacht,supertank
Rowing a boat increases friction. The oars create resistance against the water, which generates friction that helps propel the boat forward.
uncle