- An organism requires energy for growth and repair
- A human is a kind of organism
- Therefore, a human requires energy for growth and repair

- Nutrients are a source of energy for living things
- Food contains nutrients
- Hence, food is a source of energy for living things

- Food is a source of energy for living things
- A human is a kind of living thing
- Therefore, food is a source of energy for humans

- A human requires energy for growth and repair
- Food is a source of energy for humans
- Therefore, humans require energy from food for growth and repair

Hence, humans require energy from food for growth and repair
Q: The human body gets the energy it needs for growth and repair directly from
Context:
- An organism requires energy for growth and repair 
- Nutrients are a source of energy for living things 
- A human is a kind of organism 
- A human is a kind of living thing 
- Food contains nutrients