Thank you that was very helpful
also i'm not sure about my answers for these if someone could give feedback
1. Add something about rabbits not having natural predators in Australia to control the numbers, like they did in England, because they didn't evolve with the Australian food chains. (If you look at the question as a whole it's asking about what differs in Aus from Eng, so it would be better to make a statement of comparison, rather than just focus on Australia imo). Also, I would add about why they are pests, not only the large numbers but also that they are detrimental to agriculture/compete for the same niche with our native animals.
4. It would be incorrect to say that 'relatives in England would not have developed resistance since the virus was not introduced in England'. You should assume that there are small numbers of rabbits in England with the resistance genes, but there are no environmental selection pressures there that will cause that trait to increase in frequency because it doesn't give them any advantage. I'd write that the Australian population has a much higher frequency of virus resistant rabbits, due to this trait being advantageous to survival here, but not in England