Third person plural pronoun is THEY.
If you want to create a possessive pronoun out of that one, that would be THEIRS.
Possessive pronouns, as the name itself says, determine some kind of possession. For example:
Is this books yours? - No, it's theirs.
Answer:
shape metal by melting it and pouring it into a mold
Explanation:
To cast is to pour a melted metal into a mold so that it acquires the form of the mold. A cast piece is not formed under pressure but rather left to take on the shape of the mold in which it is poured.
Casting can be used for many different types of material, of which some of the most common are plastics and metals since they can be melted relatively easily and their is a demand for them to be made into certain shapes.
The answer to your question would be A
So no one gets hurt in case of an emegancy
