Based on the meanings of the words in the text, it can be...

“...ensure...” (line 6) and guarantee are antonyms.

“...outstrip...” (line 10) and exceed are synonyms.

“...downgraded...” (line 13) and subsidized express similar ideas.

“...highlights...” (line 35) and underlines express contradictory ideas.

“...owing to...” (line 57) and as a result of have opposite meanings.