To know if something is spoiled or molded. To make sure that it wont give you the stomach virus or food poisoning.
Answer:
The 3rd Option
Explanation:
Simple for this question, C: an investigation because it uses only observations.
Answer:
There are four species within the genus Shigella: Shigella dysenteriae, Shigella flexneri, Shigella boydii, and Shigella sonnei.
Explanation:
