Hi all! 
If anyone has a little time and energy and wants to take a look at my assessment, you guys are welcome.
I think it is correct but any help is always welcome 
These are my links:
Thanks in advance and have a nice day! 
Welcome back @Gabriel_ML 
It’s nice to see you progressing through the assessments.
Very well done on this one. Congratulations!
Was there any specific issue that you used inside the empty cells? I think you can just leave the tags empty like <td></td>.
Good luck in your further assessments!
Michael
Hi @mikoMK
Thanks++ for your comments!
Answering your question:
It was because I saw it in the source code of Adding headers with <th> elements 
But although this answer is true 
, it may not be correct 
, so I have done a little search 
and this may be some possible answers …
“The non-breaking space
is an entity in HTML that has non-collapsing behavior”
From Wikipedia
“Notice that empty table cells are filled with the entity
. If this is omitted, the cell borders will not always display correctly.”
From (X)HTML Tutorial
“Another common use of the non-breaking space is to prevent browsers from truncating spaces in HTML pages.”
From w3schools
And finally I made a little test… 
https://jsfiddle.net/Gabriel_ML/gt9hb1nv/4/
I think these may be the reasons to use or maybe not 
Have a nice day! 
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Thanks for digging deeper, @Gabriel_ML 
So in conclusion we could say: If we have a table row without any data and want it not to collapse, we need at least one cell with a non-breaking space ( ).
Learned something today
All the best!
Michael
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