Biotic components are living things. The root word bio means life. When you say something is abiotic, it means non-living things. The prefix "a" means not or non.
Sunlight and heat: Abiotic
Insects: Biotic
Rotting log: Biotic (This is considered biotic because it was a living thing.)
Bacteria: Biotic
Water: Abiotic
Rocks: Abiotic