What is the economic term for the amount of something available and the demand for goods?

The term "quantity supplied" refers to the amount of available product. For instance, if a farmer provides 100 bushels of corn, then this is the quantity supplied of corn.

On the other side, the term "quantity demanded" refers to the amount of items people are willing and able to pay for. Both components must be present. If someone is willing to pay for something, but not able to, then this isn't part of the demand equation. Likewise, if they have the money, but don't want the product, then it doesn't make sense to include this as part of demand either.

the answer is actually b.   as habitats are destroyed, animals and plants may become extinct.   , according to edge nuity

a direct vote in which an entire electorate is invited to vote on a particular proposal. this may result in the adoption of a new law.