A 10.6.16 Choose the correct linker.1) To begin with/Such as, space exploration could help us find other planets that could support life.2) First of all/For instance, we could find planets that have similar conditions to ours.3) This is because/As a result, humans have an alternative place to live if Earth becomes too dangerous.4) In conclusion/However, there is no doubt that space exploration is expensive.5) In particular/in contrast, building spacecraft and preparing missions costs taxpayers a lot of money.6) That is why/For instance many people feel the money would be better spent on public services.