4. phase out= to gradually stop using something
E.g. Over the following three years, the use of the drug will be phased out.
5. in a bid to= in order to
E.g/ By the May Day holiday in 2018, the museum may offer tickets for different periods throughout a day, in a bid to avoid too many tourists at a time.
6. triggered=01 to make something happen
E.g. The news of his death triggered more violence.
a.to cause someone to have a particular feeling or memory
You find that strangely familiar smells trigger memories of childhood.
b.to cause someone to do or say something
E.g. trigger a response/reaction: The report has triggered a fierce response from the governor.