Your answer is A, input device.
It is important so you know when it was made for the future
so you can figure out what it is for if you forget
Answer:
Developers don't need a special program to view or edit it.
It makes markup languages independent of hardware and software
Explanation:
Markup just means that it's easily readable by humans. However, you'll often need specific software to be able to edit it, as opposed to plaintext, which could be edited in notepad.
A linked goal is connected to a situation. Since all the other choices does not compliment the word connected. The linked word is another word for connected which fits your sentence perfectly. So the answer to your question is linked.
