A. Cardio activities increase your physical strength, while strength-training activities work your heart and lungs.
The answer to the question is A.
<span>The winds and currents flow faster at the equator than the poles because the equator is much warmer than the poles. Also the Earth's rotation is much faster at the equator than at the poles.
-I hope this is the answer you are looking for.</span>
Actually, two of the statements can be argued to be true:
1)Changing several different factors in an experiment takes too many controls.
This means that for every factor that is changed you need a control which has all the other factors stable - but with many factors, this might be undoable.
2) - and this is the best answer:
When only one factor is changed, you can be more certain that it caused the results.
If this factor is the only thing that changes, you can safely assume that it caused the results!
I believe the correct answer from the choices listed above is option C. The instrument that is <span>best suited for measuring the dimensions of a shoebox would be a ruler. A triple-beam balance is for measuring mass. A volumetric flask is for volume. A caliper is measuring lengths of small objects.</span>