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The correct answer is letter C, in most primates, the inability to move the ear has been replaced by the ability to stand upright on two legs. This is because movement was much of a need to these primates than hunting for food. They needed to be agile to locate specific places where sources of food are abundant.
<span>The pairs would be:
1. increased surface area
</span>finely divided solute <span>
Increased surface area of the solute will make the solute </span>finely divided. Since the area of the solute that touches the solvent is higher. Since the area of work is bigger, then the work would be faster.<span>
2. like dissolves like
</span>matching polarity<span>
Like dissolve like because a matter tends to clump up with the same kind of polarity. Water is polar and will be a good solvent for a polar solute because they can form hydrogen bond which makes it easier to spread.
3. temperature
</span>rate proportional to kinetic energy
The temperature rate proportional to the kinetic energy, which makes the molecules move faster. A faster movement will make it spread easier. That is why higher temperature will result in higher solubility and faster rate of <span>dissolving
</span><span>
4. stirring
</span>spreads solute throughout solution
Stirring will help spread the solute. When the solution is not stirred, the solute that dissolved will be concentrated near the solute. This will decrease the rate of dissolving around it. Stirring help by moving the dissolved molecule away from the solute, makes the solute exposed more to the solvent.
