Fill color is the answer hope this helps
the first row in a table is classed as the header row.
and with the last one I'm not sure because as far as I know there's not considered a last row.
Answer:
Extended star topology
Explanation:
The Extended star topology also known as the tree topology comprises of characteristics of the linear bus topology and star topology.
It consist of multiple star connected topologies connected to a linear backbone bus topology. It has a wider communication area than the star topology and uses more cabling length. All the star networks are connected to a central connection which allows to have a full functioning network when others fails.
Explanation:
Concatenation allows you to add multiple strings together to form one long string by using the '+' operator between each string, so the purpose of concatenation is "<em>to combine two or more strings into one big string</em>" (third option).
Hope this helps :)