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B. Increases its pressure.

A. Be prepare for a sea level rise.

B. The density would decreases.

Explanation:

If carbondioxide gas is added to the water, more pressure is needed for it because carbondioxide gas is insoluble in water so due to its insoluble nature , high pressure is needed for its addition. If the sea level rises, the areas along coastal region will sink so we give warning to the people i. e. be prepare for a sea level rise. If the temperature of water increases so its density decreases.

reflecting point a across the origin negates both of its coordinates.

b = (5, -4)

true. earthquakes are felt whenever there is a slip around a fault in the rocks below the earth. this reorientation of faults create sesmic waves and is known as earthquake, the severity of which is measured in richter scale. these are more prominent in hilly regions as the rocks usually form faults to balance the pressures on it.