Question

what is expansion and contraction ?​

Answer 1

Answer:

Contraction. (Science: physiology) a shortening or reduction in size, in connection with muscles contraction implies shortening and/or development of tension

Expansion is defined as the act of getting bigger or something added onto something else. An example of an expansion is an extra three rooms built onto a house. A period of increased economic or business activity.

Answer 2

Answer:

what is expansion and contraction ?

here is ur answer