Fruits contain acids that make them sweet!
I believe the answer is protein
They provide an important habitat!
While you didn't provide us with a list of foods that Anna is eating or has eaten in the past, her diet would be appropriate for her if she was abstaining from food that has a high glycemic impact (bread, pasta, candy, chocolate) on her body, or just food which contains glucose in general. Both of these are not allowed for diabetics as they might trigger unwanted effects.
Answer:
convergent evolution:
Explanation:
organisms which are not closely related may adapt similarly when exposed to similar environments, thus have similar structures.