yes indeed solids can flow as well. all states of matter are fluids.
A solid does not flow easily.
The lithosphere is solid and does not flow, but is carried on top of the asthenosphere.
It cannot flow because its not hot
This depends on how dense the solid is, and how dense the liquid is.
in some cases yes e.g sugar is a solid but moves like a liquid so yes solids can flow
yes because it is a solid that can move
Generally, no. That's what makes it a solid. Unless of course the solid has holes in it.
SOLID
smoothly
A glacier is an example of a solid that flows, albeit very slowly.
plasticity
In the mantle