Scientists theorize that australia was once part of a larger mainland area but due to plate tectonics, broke away. according to island theory, scientists can explain all but one of these occurrences as a result of australia becoming and staying an island for a very long time. that is
a) extremes in size, large or small.
b) the evolution of flightless birds.
c) the presence of relics, like the marsupials.
d) a large assortment of plant dispersal mechanisms.

answer; i believe that the correct answer is (light);

the truman doctrine was an american foreign policy whose stated purpose was to counter soviet geopolitical expansion during the cold war. it was announced to congress by president harry s. truman on march 12, 1947, and further developed on july 12, 1948, when he pledged to contain threats to greece and turkey.

that would be called plucking : )

explanation:

''plucking, also referred to as quarrying, is a glacial phenomenon that is responsible for the erosion and transportation of individual pieces of bedrock, especially large "joint blocks". as a glacier moves down a valley, friction causes the basal ice of the glacier to melt and infiltrate joints (cracks) in the bedrock."

the atomic number of magnesium is 12. its nucleus must contain 12 protons and no electrons. the atomic number of an atom is determined by the number of protons.

magnesium is an electrolyte injection commonly used to treat low magnesium levels in your blood. it is also used to prevent or control seizures in women with preeclampsia or eclampsia.