Answer:
Heterotrophs
Explanation:
A heterotroph is an organism that eats other plants or animals for energy and nutrients.
THIS TYPE OF RELATIONSHIP IS CALLED "COMMENSALISM"
4) stimulating the production of antibodies
so in future when you catch the same cold your body will be able to produce antibodies quickly because the memory cell remembers the antibodies that fights off the colds
i hope this helps and sorry if this is wrong
The surviving R strain transformed into a living S strain.
The answer is wave erosion