English articles: a or the, what's the difference, english grammar

This video will finally help you understand and remember the difference between a and the! The indefinite article and definite acricle are two very confusing concepts in the English language! I have composed a poem to make it easier for you to remember the difference! I also give you some good examples which demostrate the difference and make it crystal clear! Learning English grammar can be fun!
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[RahulAtri]

hello mam, long time to see u. firstly Thankyou mam for great explanation! and helpful lesson. ☺🥰it may seem easy to use but a little try😉
some examples related:
office authority must receive 'a' charge for security of documents.
- the legal charge. (definite)
I need a time interval in action movies.
- I need the short time interval in action movies. (definite)
there is a little confusion and the confusion(definite) impact adversely manager's decision. The decision (definite) is in a Favour of young employs. the employs have less experience. (definite)

[nxqbmkh]

I have a question
can i use another particle in many cases?

[dan]

So far, the industry has staved off several bans by mounting legal challenges arguing that they offer game of skill and not those purely dependant on chance ---a tenuous distinction for Do I require a comma (, ) prior to that participle mounting legal challenges, arguing that)