Charles Darwin developed the idea of natural selection after a five-year voyage to study plants, animals, and fossils in South America and on islands in the Pacific. In 1859, he brought the idea of natural selection to the attention of the world in his best-selling book, On the Origin of Species.
Answer:
<h2>chlorine, iodine </h2>
Explanation:
halogens are those belonging to 17th group in a modern periodic table....
