The immune system<span> is made up of a chain of cells, tissues, and organs that work together to protect the body. </span>
The best option i see is B: Temperature and Precipitation
The answer to the question asked above is when bonding lead, it easily binds with other lead. Also malleability is the property of a material to be hammered, thus bonding with lead is easy.
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Destroyed buildings, fire, flooding I believe.