https://theprint.in/india/less-lipstick-more-eyeliner-how-covid-has-changed-indias-makeup-market/537264/

With the above article, please help me the answer:

1. What is an externality and why can it be both a positive and negative? Use your text material to respond.
2. Within your articles Is it a positive or negative externality? What makes it positive or negative? Use your text to support.
3. Within your articles is there an externality that is a problem? Why is it a problem?What regulation(s)/policies are either in forced or under scrutiny for regulation? Be specific.

Thank you in advance.