Answer:
I think the answer is the first option, more reliable and harder to use.
Explanation:
I think this because technology is expensive and the most reliable thing we have right now so the other options don't make sense.
Answer:
what I don't understand what is the Ctcagt
Hormones -- such as melatonin and cortisol; the former signals the body to go to bed, while the latter signals for the sleeping person to wake up -- are created by physiological changes.
The pH will decrease because lemon juice is very acidic meaning it would bring the pH level down to a more acidic value.
