Question

question 1
what criteria must geologists consider when deciding to extract minerals?
only the purity of the mineral
only the market price of the mineral
both quantity and market value
only the depth of the mineral deposit

Explanation:

Geologists need to consider both the quantity of the mineral deposit (to ensure it's worth extracting in terms of volume) and its market value (to determine economic viability). Just looking at purity (without quantity and market value context), market price alone (without knowing quantity available), or depth only (ignoring economic aspects like market value and quantity - related extraction costs) is insufficient.

Answer:

Both quantity and market value