Yes, people hunt in deserts unless laws prohibit it in certain places - parks, wildlife preserves, etc.
Yes, people have a variety of occupations in the deserts.
Austria has no deserts.
Some deserts, such as the Thar Desert, have relatively dense populations of people. Some deserts have few people. Each deserts has its own statistics.
yes
Most people who live in deserts live there because they like the desert. I live in a desert and love it.
By 'they' I assume you mean people. Yes, millions of people around the world live in deserts, including the author of this answer.
Their deserts were used to protect them from invasions.
Yes, many people live in the deserts of Africa.
Their deserts were used to protect them from invasions.
Yes, deserts have winter. Some deserts can be very cold in winter even if summers are hot. Some deserts are quite mild in winter.
DO leapords hunt people
Nearly the entire state of Nevada is covered by deserts.