MARKING BRAINLIEST! Many processes occur in the digestive system. Which process is best classified as a physical change?

A. digestive enzymes breaking down proteins into smaller fragments

B. teeth grinding an almond into smaller pieces in the mouth

C. bacteria converting lactose into simple sugars in the intestines

D. saliva converting the starch molecules in crackers into simpler sugars

a

explanation:

the ozone layer acts as a filter for the shorter wavelength and highly hazardous ultraviolet radiation (uvr) from the sun, protecting life on earth from its potentially harmful effects. when the sky is clear, there is an inverse relationship between stratospheric ozone and solar uvr measured at the earth's surface.

a chemical change results in a new substance being formed; whereas a physical change will result in a different state of matter

explanation: