The principle underlying this change is called progression. This principle tells us that when your fitness level improves, your body has adjusted to your regular routine; thus, you will feel less sore than when you started the squats three weeks ago. During this time, your muscles have developed<span> and your body has adopted to the stress brought about by your exercise. </span>
A The observed differences in plants height are due to genetics.
There is not enough evidence to support that <span>vitamin C aid in sore throat. But there is no harm too.
In the medical field, every treatment should be supported by evidence. This practice called evidence-based medicine. There is so much drug claim that actually wasn't supported by research and might be potentially doing more harm than benefit. Theory or argument about why it should work is not enough, you need to do a research to find the truth.</span>