Answer: Migrants have contributed to the development and expansion of small businesses, which are the cornerstone for the Australian economy. They have contributed to the development of technology bringing to the country cutting edge technology in particular from Asia and Eastern Europe.
Explanation: i hope this helps :)
ANSWER IS:
A. Artificial translocation of organisms
B. Physical removal of organisms
D. Habitation modification
EXPLANATION:
Natural distributions of biomes are often severely modified by human activities through physical removal, habitat modification and artificial translocation of organisms.
Humans can alter natural distribution patterns astonishingly quickly
Artificial translocation of organisms :
It leads to introduction of exotic species that have an effect on crops and pets
Physical removal of organisms :
Physically organisms are removed by modification of landscape for civilization. It effects overall distribution patterns.
Habitat modification :
Habitat is the natural environment where an organism lives. Human activities are responsible for the alterations in the habitat of many organisms that leads to their extinction.
For example, because of tropical rain forest removal it leads to loss of 27 million acres of rain forest per year.
Ecosystem can also effects from rain forest removal. Biodiversity lost through extinction.
Substinence farming is farming food that is just enough to live off of. You don't sell substinence crops.
Commercial farming is growing food to sustain you, and having enough left over to sell.
In both, you grow food and you keep some (or all) for yourself.
