Answer:
The formation of foam is a process when the small bubbles of the gas get trapped inside a solid or a liquid a form is made and gets made by the tapping of millions of small bubbles and can be seen in marshmallows. The process of foam formation is thus through a dispersed medium and in general gas is present.
The foam is thus evidence that respiration, is taking place as carbon dioxide is a product of respiration.
Step-by-step explanation: