Student or Learner
is this a noun phrase...transport links
There are two possibilities. What is the context, the sentence it sits in?
Possibility #1: noun phrase
Transport is a noun in form and it functions as an adjective modifying the plural noun links.
Possibility #2: clause
Transport is a noun in form and it functions as a subject. Its verb is links, which is why links has an -s.
It agrees with its subject in singular number.
Does that help?