The cracks are known as faults
Among the choices, bromine exists as liquid under standard temperature and pressure conditions. Unlike other diatomic molecules which exist as gases, due to its heavy molecular weight, it exists as solid. Francium and cesium are solids while iodine is gas.Answer is 1.
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<h2><u>Answer</u> :</h2>
The most appropriate option is :
![\hookrightarrow \bf2. \: \mathrm{ \underline{oxygen \: \: and \: \: silicon}}](https://tex.z-dn.net/?f=%5Chookrightarrow%20%5Cbf2.%20%5C%3A%20%20%5Cmathrm%7B%20%5Cunderline%7Boxygen%20%5C%3A%20%20%5C%3A%20and%20%5C%3A%20%20%5C%3A%20silicon%7D%7D)
Since, they are the most abundant elements found in Earth's Crust.
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