Grammar fix
a key driver
main factor (figurative, abstract)
an important factor or main reason that strongly influences a situation, change, or result, especially in discussions about trends, progress, or causes.
Hear it in context
Notice where the phrase sounds natural.
- Rising energy costs have become a key driver of inflation in many countries.work
- In my opinion, urbanisation is a key driver of environmental problems, as it leads to increased pollution and greater demand for resources.IELTS speaking
Fix the pattern
Pattern: a key driver of [noun/gerund]; [noun/gerund] is a key driver of [noun/phenomenon]
WrongTourism is a key driver for the economy.
RightTourism is a key driver of the economy.
'A key driver OF' something, not 'for'.
Patterna key driver of [noun/gerund]; [noun/gerund] is a key driver of [noun/phenomenon]
Use it right
Choose the version that sounds natural in speech.
'A key driver of' is standard analytical phrasing; the paraphrase is bulky.
Build natural chunks
Words that usually travel with it.
a key driver ofof growthof changeof demandbehind
Don't confuse it
Unlike the literal meaning of 'driver' (a person who drives a vehicle), this sense is figurative and refers to something that causes or powers change or progress. It is more precise than simply saying 'reason' or 'cause', as it emphasizes influence and momentum.