Death Events, Arrows and Natural vs Spawned mobs

[TenReeez]

Is there a way in lootables:
1: depending if its a spawned mob or a natural mob to give different drop items?
2: how to write in lootables if mob dies by player killing it gets a different drop compared to fall/lava damage?
3: How to give different arrows on mob death: ie poison arrows, slow falling arrows etc

thankyou