Borders drawn to avoid dividing islands

In the late 1990s, brazil’s poor people protested about crowded cities land distribution mining permits industrial pollution

Which outcome is not caused by gravitational forcea. gas and dust come together to form a planet b. planets orbit a star c. two atoms come together to form a molecule d. stars cluster to form a galaxy

According to the population pyramid, in 2000 china had about 120 million people in which age-group?