I think that the answer might be B.
Compare the density of the object in question to the density of water. If its density is less than water, it will float. For example, oak floats because its density is 0.7 g/cm³. If the density of an object is greater than water, it will sink.
The rate of movement increases, as they get faster with more energy.
<span>NaOH + HCl = NaCl + H2O</span>
