Question

he looks _____the legislation to hasten the progress of reforms​

Answer 1

He looks into the legislation to hasten the progress of reforms...

Answer 2

ANSWER:

"He looks into the legislation to hasten the progress of reforms".

EXPLANATION:

Prepositions are the words that proceed with noun or pronoun to show the relation with other element in the clause. ‘at’, ‘on’,’of’, ‘into’, ‘for’ etc are some of them.  

‘into’ is used in reference to somebody or something in the phrase.

‘for’ is used to indicate something.

‘on’ is used with reference is with respect to objects.

‘in’ is used with reference to unspecific times during years, days, hours etc.

The given sentence talks about referring to something. Legislation is the set of laws set up in our constitution. So, ‘into’ preposition is used.