Question

Why solid has a
fixed shape?​

Answer 1

Answer:

solid have a fixed shape because the particles of matter are tightly packed in solid state

Answer 2

$\tt\pink{Answer~\:}$

In the solid state, the individual particles of a substance are in fixed positions with respect to each other because there is not enough thermal energy to overcome the intermolecular interactions between the particles. As a result, solids have a definite shape and volume.