Explain the concept of ‘natural selection’ and what it really means

Explanation:

Instead of the term natural selection used by Darwin, Herbert Spencer used survival of the fittest. According to Darwin, out of the vast number of individuals which complete for a place in the world, only those having advantageous variations survive and reproduce. Those who do not have these variations die. Thus, the nature exercises it's selection on only those individuals, which are the fittest; only they survive and reproduce successfully. The process is called Natural Selection.

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2b2t

explanation:

2b2t

nacl or sodium chloride is an ionic compound. this is because an ionic compound pertains to a compound that consists of positively and negatively charged ions. in this case, na (sodium) has a tendency to lose one electron when it reacts with with other atoms, so the resulting sodium ion contains 11 protons and 10 electrons, thus making it positively charged (na+), when chlorine reacts, it usually gains one electron to form an ion called chloride, thus making it negatively charged ( since the ions are oppositely charged, they attract.