What are rod puppets?

Generally, the term "rod puppet" refers to a category of puppet which is manipulated from below with rods. Usually a central rod supports the head, while two smaller rods control the arms. In some cases, the central rod can be concealed by the puppet's costume.

Explanation:

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option c (nickel) is not found in earth's crust. the earth's crust basically contains eight (8) elements namely: oxygen, silicon, aluminum, iron, calcium, sodium, potassium and magnesium (listed in order of abundance).

where and what are the statements?