Yes
yes
Soil erosion
go look up how to make a volcano model on this website
It is unclear what it means to "help" a volcano, but water does tend to make eruptions more explosive.
No. Weathering will gradually destroy a volcano that has nor erupted for a long time.
No, it's main feature -- Yosemite Valley -- was created due to glacial erosion.
Factors such as the type of eruption (explosive or effusive), the composition of the magma, and the presence of glaciers or erosion can all contribute to changing the shape of a volcano. Expansive eruptions can lead to the collapse of the volcano's summit, while erosion can alter its overall profile over time.
Maybe yes because erosion is happening erosion carry rocks and sediments
If the active Volcano is supplying the materials to help build the island (Ex: Ash) and the supply is no longer available (like when it becomes dormant or inactive) erosion from the waves will slowly erode the land.
No, Table Mountain in South Africa is not a volcano. It is a flat-topped mountain formed through erosion and has no volcanic activity associated with it.
They help to prevent erosion by holding the soil together.
No, they do not.