The is a definite article meaning that you cannot use it
"an" can only be used before words beginning with vowels
therefore the answer is" a"
b. His love for her comes naturally.
Hi !!
International businesses need to keep track of all the legal holidays and all the countries in the world
international holidays = <u>complete subject</u>
<em>need to keep track of all the legal holidays and all the countries of the world = </em><u>predicate</u>
the complete subject tells what the sentence is about ...
the complete predicate tells what the subject does ...
hope this helps :)