the types of nests they build the lengths of their tails the shapes of their beaks the colors of their feathers
I am hesitating between 4 options to answer the following question, which option should I choose?
Question: A few types of birds live in the same ecosystem. Which of these characteristics would most likely affect how they compete with each other for food?
Possibilities:
- the types of nests they build
- the lengths of their tails
- the shapes of their beaks
- the colors of their feathers

the shapes of their beaks