This type of organism can be anywhere from the size of my fist to 3 times as large as I am. They can walk or run. They have either 2 or 4 legs and have to hunt for their food. I observed its cells under the microscope. Each of the cells had a very large, darkened circle inside of it as well as other small structures that had lines around them.

Belongs to Animalia kingdom

Explanation:

In the given question, the options are not provided but it can be assumed that the examiner is asking about the kingdom of the organism which shows these traits.

The provided characteristics are:

1. size- from a fist to 3 times larger than humans

2. can run or walk- that is they show movement

3. walk with- 2 to 4 legs

4. hunt food- are mostly heterotrophic

5. cell has a dark circle- nucleus

6. small structures around the nucleus- organelles

These characteristics are shown by the organism belonging to the Animalia kingdom.

Thus, the Animalia kingdom is the correct answer.