There are many things that can affect ocean currents. Particularly wind. Changes in temperature with air currents and tides affect it as well.
Where air pollution is not especially severe, predators have much more impact on leaf-beetle populations than parasites do
<span>Distance vs. Time Graph
x-axis (horizontal)= Time
y-axis (vertical)= Distance</span>
<em>it would be b and c</em>
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<em>it's the whole ''ecosystem''</em>
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