eating and moving moving and digesting digesting and excreting excreting and eating
I gave my students this multiple choice question: Oscar and Andre used a microscope to observe a sample of pond water and drew an example of each type of organism they saw. Then they compared their drawings. They discovered that their drawings of a euglena and a paramecium were alike, but their amoeba drawings had very different shapes. What are two things that Oscar's amoeba could have been doing that made his drawing look different from Andre's?

Only one answer is correct among these 4 choices:
- eating and moving
- moving and digesting
- digesting and excreting
- excreting and eating

Could you tell me which one is correct?

eating and moving