Answer:
Water
Step-by-step explanation:
When a colloid such as a gelatin forms, water is entrapped by the process of protein coagulation.
Colloids can be describes as particles of solid having spherical diameter between 1 and 100 nm which are dispersed in the liquid medium. Coagulation can be described as a process in which particles aggregate and lead to the formation of flocs. Flocs can either settle in water or can easily be seperated from water.