Answer 1

Hello! Your question is very popular and has been asked in this section a huge number of times. Please, try using the search bar in other cases. It is located at the top of the mobile app window and looks like a magnifying glass icon. Good luck!

https://www.sololearn.com/Discuss/1316935/?ref=app

You need to upload file to a cloud site like Dropbox, if your file is in your mobile... So upload and then copy that link and paste as src value.
To know how to upload and import to Program..

Run this code and see steps to follow:
For images :
https://code.sololearn.com/Wy3lrXNwGsgJ/?ref=app
For all files :
https://code.sololearn.com/WW6t4B73kJVz/?ref=app

https://www.sololearn.com/learn/HTML/1030/

From search bar :

https://www.sololearn.com/discuss/2402873/?ref=app
https://www.sololearn.com/discuss/2405860/?ref=app
https://www.sololearn.com/discuss/2406958/?ref=app
https://www.sololearn.com/discuss/2407672/?ref=app