Answer:
privacy
Explanation:
The full sentence from the text is "Birds that have to look for food on their own can easily find it in places where they can eat in relative seclusion".
Now, the very definition of seclusion is a state of being away from others, alone.
Now comes the tricky part; both privacy and isolation can fit to this definition.
However, from the context of the sentence, we see that this seclusion is relative and that it only refers to finding food and eating. That means that, since the food is scattered all around, each bird can enjoy its own food without sharing or fighting with others. That doesn't mean that the bird is absolutely alone at the moment, only that it has some food for itself.
On the other hand, isolation refers to physical separation from others.
Having this in mind, privacy is the best fitting answer.
