Answer:
1 - I look forward to learning to drive.
Explanation:
The infinitive is the base form of a verb. It usually consists of the infinitive marker <em>to </em>and the verb itself (e.g.<em> to read, to run</em>).
The infinitive is present in all sentences (<em>to drive, to change, to go, to surrender</em>), but in the first one, we have another type of <em>to </em>(<em>I look forward </em><em>to...</em>). Here, it is a preposition that is a part of the phrasal verb<em> </em><em>to look forward to.</em>
Phrasal verbs are phrases that consist of a verb and another element - an adverb, proposition, or both. <em>Look</em> is a verb, <em>forward </em>is an adverb, and <em>to </em>is a preposition.
This is why the first option is the correct one.
