What is implied movement? for like art

What types of visual art mediums are heavily based on observation?

Some have called jazz music “america’s classical music.” what is meant by this statement? do you agree or disagree?

Achair of height 1 m is placed 1 m in front of a plane mirror. a girl is standing 3 m behind the chairas shown. find the minimum length of the plane mirror in order that she can see the whole imageof the chair.a. 0.50 mb. 0.75 mc. 0.80 md. 1.00 m