Answer: Food and space
Explanation:
Think of the squirrels and birds. They both reside on trees and they compete for the resources like space and food available on the trees.
The fruits that is available on the tress has competition between the birds and squirrels.
Both of the organism also have competition for the space to live. Though birds are not available at the day time but they come to stay on trees at evening and night.
The squirrels have a better grip to fruits in their hands so that the birds cannot get it from them.
Squirrels also move on the land for the food so that they have less competition on trees for food.
