Material Cause
What somethings made of.
Doesn’t explain anything.
Eg MC of a Rat is blood, bones etc.
Formal Cause
Provides the shape and allows it to be identified as whatever it is.
Rat is recognised through its size, shape and features.
Efficient Cause
The activity that makes something happen.
Eg EC of a desk is the carpenter.
EC brings about change in something.
Final Cause
Somethings purpose, and reason for existence.
The FC of a desk is for writing.
FC of a mug is holding drinks.
Understood as ‘Telos’ - ‘a means to an end’