I will try to answer at the best of my ability.
She may have Gastritis.
I hope this helps, and if it is wrong, I am truly sorry.
Physical and chemical changes may be similar because neither can change the number of atoms of each element that are present.
<h3>What do you mean by Physical changes?</h3>
Physical changes may be defined as those changes which appeared physically like color, odor, texture, mass, and density.
Chemical changes may lead to the formation of new chemicals with definite properties. It involves when the chemical identity of any substance may alter.
Therefore, physical and chemical changes may be similar because neither can change the number of atoms of each element that are present.
To learn more about Chemical changes, refer to the link:
brainly.com/question/17384175
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The correct answer is c. The microbes are useful research tools because they are cheap and easy to grow in the laboratory and they use the sample