Answer:
The correct answer is option b. "amoeba".
Step-by-step explanation:
Amoebas are microorganism that live in fresh water, salt water and inside other organisms. Amoebas are very simple microorganism because they are comprised of a single cell which is basically a nucleus and a protoplasm. The nucleus is where the genetic information is located and inside the protoplasm is where other organelles are located, such as vacuoles and pseudopodiums.