Eucalyptus and Australian acacia
There are two answers. The rabbit is the main problem, as it eats the vegetation which is the food source for native animals. The fox is also a major problem for Australia's native animals, though it does not cause the same damage as rabbits do to native plants.
they arrived by traveling from Africa Jamaica and other country to Australia
The main food of the Southern cassowary is fallen fruit of over 200 species of native rainforest and bushland plants.
The main reason for the decline of native fish numbers in Australia is the introduction of the European carp. This invasive species was introduced into Australia during the 1800s. European carp carry diseases such as Asian fish tapeworm that can affect the native fish. They also disturb the riverbeds and creekbeds in Australian waterways, which interferes with how native fish feed.
There are three main types of plants: vascular plants (having vascular tissues for water and nutrient transport), non-vascular plants (lacking vascular tissues), and seed plants (reproducing through seeds). Each type has various subcategories based on characteristics like reproduction, size, and habitat.
The main newspaper in Australia is The Australian.
The main faith in Australia is Christianity.
In Australia cats (both feral and pets) are the major/main killers of native lizards, skinks, frogs etc.
The main crop grown in Australia is wheat.
Tasmanian Devils are native to the continent of Australia. They are no longer found on the mainland, though fossil evidence indicates that they did live on the main continent prior to the introduction of the dingo. Tasmanian devils are now found only on Australia's island state of Tasmania, which lies to the south of the mainland.
There are two main kinds of organisms that have prokaryotic cells: Bacteria and Archaea. These organisms lack a true nucleus and other membrane-bound organelles in their cells.
The main form of transportation in Australia is the car.