Biotic or Abiotic?

Here's 20 different things on my plot:
Squirrels-biotic
Oak Tree-biotic
Pine Tree-biotic
 Rocks-abiotic
Water-abiotic
Sand-abiotic
Old Metal-abiotic
Lots of Leaves-biotic
Deer-biotic
Turkeys-biotic
Woodpeckers-biotic
Songbirds-biotic
Trash-abiotic
Grasses-biotic
Burrs-biotic
Wild Blackberries-biotic
Dead Branches-biotic
Snakes-biotic
Hawks-biotic
Bard Owl-biotic