I believe D because non of the answers above are reality, humans are great at living in different types of environments and even tend to change there environment.
Elements are those substances that contains atoms that are indivisible by any chemical means.
The properties of these elements varies in a particular manner, therefore they are distributed into groups.
Based on the descriptions from the question, the groups are:
- Group 7: Chlorine is a highly reactive gas found in group 7 because it contains seven valence electrons in its outermost shell.
- Group 1 : Potassium is an extremely reactive metal found in group 1 because it contains only one valence electron in its outermost shell.
- Group 4: Silicon is a metalloid that belongs to group 4 because it contains four valence electrons in its outermost shell.
- Group 2: Calcium belongs to group 2 because it contains two valence electrons in its outermost shell.
- Group 0: Neon is an inert gas found in group 0 because its outermost shell is completely filled up.
- Group 3: Aluminum is the most abundant metal found in he earth crust which belongs to group 3. This is because it contains only 3 valence electrons in its outermost shell.
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