How do mangrove tree roots help to build up dry land? a: by holding slit
b: by absorbing water
c: by decaying quickly
d: by spreading quickly

Which of the following statements best explains why there tends to be a greater number of large cities in southern africa than the east africa

What type of aid does nigeria receive? short term, tied, voluntary, bilateral, multilateral or long-term?

Which of the following can scientists estimate geologic time? a.observing rock sequences b.radiometric dating c.comparing fossils d.all of these