What does salt and light mean here?

[Ralphguy]

My teacher gave us an online quiz about salt and light, which she has not taught us about yet. I don’t understand how to answer this question. Can you help?

Question:
How does one lose his/her light and saltiness in the context of:

• Forgiving Others
• Loving Others
• Judging Others
• Reproving Others

I really don’t understand it. I would appreciate it if you guys can help.
Thanks

 

[Cruciferi]

You need to examine the history behind salt and light in the Bible. Then attempt to apply it to answer the question. In my experience random questions like these are generally made up by tenure faculty that are extremely bored. These are subjective questions. You must answer them in the way you believe your teacher would approve of.

Salt in the Bible - Wikipedia

https://www.google.com/amp/s/www.gotquestions.org/amp/salt-and-light.html