Выберите правильный вариант. 1. Probably, (that’s why/due to) its geographical position and landscapes, Australia’s population

1. Probably, due to its geographical position and landscapes, Australia’s population is very small. 2. Thanks to the fact that Anna has a beautiful voice, the concert was a great success. 3. I heard a noise, so I got out of bed and turned the light on. 4. I do it well because I trained a lot.