The most welcome feature of such a mechanism is that an issue concerning the…

Concept: In a vocabulary-in-context double-blank question, the correct word pair must pass two independent tests at once — (1) MEANING: each word must fit the sense the sentence is building, and (2) COLLOCATION/GRAMMAR: each word must combine correctly with its surrounding preposition or construction, since many near-synonyms in English take different prepositions or grammatical patterns. A word that is close in meaning but wrong in collocation still makes the sentence incorrect.

Application: The first blank needs a noun for the everyday economic well-being of farmers that a policy ‘mechanism’ could threaten or protect — the standard collocation for this sense is ‘an issue concerning the livelihood of’ a group of people. The second blank needs a verb fitting ‘taken out of the political domain and ___ to experts’, i.e. handing responsibility over to specialists — the exact idiomatic verb-preposition pairing for this is ‘entrust something to somebody’, giving ‘entrusted to experts’.

Cross-check — testing every option against BOTH tests:

• ‘liberty; empowered’ — ‘liberty’ means freedom, not economic well-being, so it does not match the sense needed; and ‘empowered’ is normally followed by a to-infinitive (‘empowered to act’), not by ‘to experts’, so the construction is ungrammatical here.

• ‘subsistence; endowed’ — ‘subsistence’ narrows to bare survival needs, a poor fit for a broad policy ‘issue’; and ‘endow’ idiomatically takes ‘with’ (‘endowed with something’), not ‘to a person’, so this pairing breaks the standard collocation.

• ‘life span; bestowed’ — ‘life span’ means duration of life, which has no connection to a farmers’ economic-policy issue; and ‘bestow’ idiomatically takes ‘on/upon’ (‘bestowed on/upon someone’), not ‘to’, so this pairing is also ungrammatical.

• ‘livelihood; entrusted’ — fits both blanks: ‘livelihood’ names exactly the economic well-being sense the issue concerns, and ‘entrust … to’ is the correct verb-preposition pairing for handing responsibility to specialists.

Result: The sentence reads ‘… an issue concerning the livelihood of thousands of farmers will be taken out of the political domain and entrusted to experts,’ confirming livelihood; entrusted as the answer.