Final answer:
The phrase 'take only what you need' implies sustainable harvesting of resources, such as sustainable fishing practices, while 'fishing by torchlight' refers to a method that could lead to overfishing. It's important to balance human activity with the health of marine ecosystems and biodiversity.
Step-by-step explanation:
The phrase 'take only what you need' refers to sustainable harvesting practices, such as fishing, where people only catch the amount of fish that they need without overexploiting the resource. This is a sustainable approach to fishing, ensuring that fish populations are not depleted and can continue to thrive for future generations.
In contrast, 'fishing by torchlight' may refer to a traditional fishing method where fishermen use torches at night to attract fish and make them easier to catch. This method can potentially lead to overfishing if not done sustainably, as it makes fish more vulnerable to being caught in large numbers.
These concepts are important for understanding the impact of human activities on marine ecosystems and the importance of sustainable practices to maintain fish populations and biodiversity.