Develop hypothesis. You need something to test, and you need to prove what you think is going to happen, in order for that to happen you need to come up with what you think is going to happen based on your previous experience ect.<span />
Answer:
Wash your hands lots (especially after contact with contaminated food/water)
Make sure the temperature that you cook your food is correct.
Avoid intake of river water.
That’s the answer hope it helps!!!