Concept:Mixed farming is a system where crop production and animal rearing are combined on the same farm, so the two activities support each other.
Explanation:In mixed farming, farmers grow crops and also keep livestock such as cattle, goats, or poultry.
The waste and manure produced by these animals are collected and applied to the farmland.
This animal manure enriches the soil with nutrients and improves soil fertility for crop growth.
As a result, farmers reduce their dependence on expensive synthetic fertilisers.
Thus, the main reason farmers practise mixed farming is to use animal manure to fertilise their crops.
This practice is sustainable and beneficial for both crop yield and animal production.
Answer:C. use the manure from the animals to fertilize their crops