Answer:
1. Species 8 and 9 . The genomes of these species have the highest rate of similarity out of all the compared species. 82% of the genes in these species are shared.
2. Species 1 and 5 . Th genomes of these species have the lowest rate of similarity out of all the compared species. Only 8% of the genes in these species match each other
3. When a species has a higher percentage of similarity with another species, it means that more of the DNA is shared. There has been less mutations of DNA between these species which means they are more closely related.
I'm not as confident with #3, maybe someone else can have a better answer for that