Let's break down the question step by step:
1. Understanding the Question: The question is asking for the percentage of protein consumed by humans globally that comes from fish. This calls for identifying the proportion of fish-derived protein out of the total protein intake by humans worldwide.
2. Analyzing the Options: The provided options are:
- 5 percent
- 20 percent
- 40 percent
- 50 percent
3. Evaluating the Answer: Based on our knowledge, it is established that fish accounts for approximately 20 percent of the protein consumed globally by humans.
4. Conclusion: By assessing the provided options and the established fact, the correct answer to the question is:
- 20 percent
So, the amount of protein consumed by humans around the world that comes from fish is 20 percent.