- An amoeba can change its shape
- A paramecium cannot change its shape
- So, an amoeba can change its shape but a paramecium cannot change its shape

So, an amoeba can change its shape but a paramecium cannot change its shape
Q: Which characteristic can an amoeba change that a paramecium cannot change?
Context:
- An amoeba can change its shape 
- A paramecium cannot change its shape