The diseases which can be passes down as genetic traits are known as "Inheritable disease" some examples are:
1) Haemophilia
2) Phenylketonuria
3) Down's Syndrome
4) Turner's Syndrome
5) Klinefelter's Syndrome
Hope this helps!
The answer is immune system
The correct answer is option D, South Africa
Prince Edward Islands is found in the South Africa in the sub Antarctic Indian Ocean.
