What does new int[2]{1,2} mean

Question

https://code.sololearn.com/cY9JFsz9KO2w/?ref=app
Why *arr becomes 2 in output??

Answer 1

I wants to ask that why *arr gives me 1??

Answer 2

And also *(arr++)<<" "<<*arr+1; gives 1 3 ...why??