What does "like" mean here?

What does "blowing up" mean?

The phrase "blowin' up" in this case is a slang term that means something becomes very popular very quickly. This usually refers to receiving a lot of text message notifications and calls on a cell phone in a short amount of time. This phrase comes from the expression "blow up", which means that something explodes. Ex: My youtube channel has been blowin' up ever since I posted that video. Ex: Stop blowin' up my phone! I am trying to study.

If I say "a habitat loss" with article "a", is it okay?

Unfortunately no. This sounds odd in English and it does not need an article for the sentence to be complete. Even though articles are really important in English, they are not always needed. We do not usually use articles when the noun refers to things in general; in this case, the Galapagos turtle's habitat. We also do not use articles when discussing sports, names of countries and places (such as a street, city, or building), and names of languages. Ex: She hates cheese. Ex: Dogs are fun pets to have. Ex: I don't want eggs for breakfast, I want pancakes. Ex: She is from Russia. Ex: I used to play basketball. Ex: He lives on East Thomas Street. Ex: I have always wanted to see Mt. Fuji.

I don't write a diary, but is it common in western culture to write a diary every day?

I'd say having a "journal" is much more popular these days than having a "diary." It's perceived as an admirable habit! It's similar to people saying they want to exercise in the new year; people also say they want to journal every day. So yes, it is common! Not everyone does it, but a lot of people do - or at least they want, or try, to journal every day. Ex: My new year's resolution is to journal every day. Ex: Sometimes journaling really helps with my mental health! Ex: I like to get my thoughts onto a page, so I journal every day.

What is the meaning of "veer"?

'Veer' means to suddenly change directions. In this context, it's used because the walking paths in duty-free section are 'suddenly' developed to the left side to make retailers take more space on the right side. Ex: I veered my car off the road.

What does "that" refer to?

"That" here refers to "the perfect scenario for the virus to be transmitted". "The perfect scenario for the virus to be transmitted" is using public transportation, which is previously mentioned.