- A plant / living thing requires nutrients to grow
- Soil contains nutrients for plants
- Hence, a plant requires nutrients from soil to grow

- Soil contains water
- A plants / living things require water for survival / to grow
- So, a plant requires water from soil to grow

- A plant requires nutrients from soil to grow
- A plant requires water from soil to grow
- Therefore, a plant requires water and nutrients from soil to grow

- A plant requires water and nutrients from soil to grow
- Plant uptake is when plants absorb nutrients / water from soil into themselves through their roots
- So, plants absorb water and nutrients through their roots

- Plants absorb water and nutrients through their roots
- Absorbing is a kind of function
- Therefore, the funtion of a plant's roots is to absorb water and nutrients

- The funtion of a plant's roots is to absorb water and nutrients
- Absorbing something is a kind of method for taking something in
- Hence, the function of a plant's roots is to take in water and nutrients

So, the function of a plant's roots is to take in water and nutrients
Q: The functions of a plant's roots are to support the plant and
Context:
- A plant / living thing requires nutrients to grow 
- Soil contains nutrients for plants 
- Plant uptake is when plants absorb nutrients / water from soil into themselves through their roots 
- Absorbing is a kind of function 
- Absorbing something is a kind of method for taking something in 
- Soil contains water 
- A plants / living things require water for survival / to grow