Which situation best describes a physical change that occurs during the process of digestion? the other three answers involve the chemical processes of digestion

B)  A large piece of food is chewed in the mouth to increase the surface area.  

Explanation:

when you chew your food the piece becomes smaller that is a physical change and I took the test

the answer is b: 1.4 km/hr

prophase: we can observe the chromosomes to coil up and condense. they become visible. nuclear membrane and envelope disintigrate.s

metaphase: chromosomes align at the center, the metaphase plate. spindle fibers attach to centromeres of the sister chromatids. they meet at kinetochores.

anaphase: sister chromatids are pulled towards each opposing centromere, set on different poles.

telophase: chromosomes are now clustered up only on either sides of the cell. nuclear membranes reform, and a new cell wall forms along the cell plate. this will lead to cytokinesis, the process that divides the cell membrane and forms the cell wall.