Routs
Which of the following is a physical change?

Explanation:

A physical change is a change in which the physical properties of matter are altered. These are properties are the forms and state.

Most physical changes are easily reversible and are pure state changes.

They  do not lead to the production of new compounds.

They involve no mass change and requires little to no energy.

Examples are melting, boiling, freezing, sublimation e.t.c

zfoods? ok, pressure is used to keep the heat inside and to keep the food perfect.

practical process described pest part of scientific investigation.

because practical knowledge is powerful then therotical knowledge.