Select them all.
It's All of the above.
E. coli and Salmonella spp.
Answer:
The answer is flattening
Explanation:
A physical change is generally something that affects the shape of form of the matter and a chemical change results from a chemical reaction. Flames are caused by chemical reactions, as is rust, and the process of a fruit becoming ripe. Thus, the answer is “flattening”.
A catalyst is a substance that speeds up a chemical reaction.
