None of these statements are accurate.
The statement "As polar ice melts, it causes ocean currents to get slower." is not accurate, as polar ice melting can actually disrupt ocean currents and make them more efficient instead of slower.
The statement "Research shows that Arctic polar ice is growing thicker and covering more area." is not accurate, as research has shown that Arctic polar ice is actually melting at an accelerated rate.
The statement "Decreased greenhouse gases cause increased global temperatures." is not accurate, as decreased greenhouse gases would actually lead to lower global temperatures rather than increased temperatures.
Therefore, none of these statements belong in the accurate boxes on the graphic.