the size of their roots the shape of their leaves the color of their flowers the structure of their cells
I am hesitating between 4 options to answer the following question, which option should I choose?
Question: Some different types of plants have characteristics in common. Which characteristic do most plants share?
Possibilities:
- the size of their roots
- the shape of their leaves
- the color of their flowers
- the structure of their cells

the structure of their cells