Help me please I have no idea what to put

Ahill is made of rock particles of different sizes. which of these agents of erosion probably caused the hill to form?

Suggest 3 different reasons why there is an ageing population in the uk .

Ascientist observes hot water erupting from a vent in the earth. what most likely caused the water to rise and erupt from the vent? the vent was lower than the water table. a well was drilled into a pressurized aquifer. a well with a mechanical pump was installed. the water was heated by magma or hot rocks.