The ore that contains both iron and copper is:

We have to identify the ore which contains atoms of both iron and copper in its chemical formula.

First, let us recall the composition of each ore mentioned in the options.

Azurite has the formula $$\mathrm{Cu_3(CO_3)_2(OH)_2}$$. We can clearly see only copper, carbon, oxygen and hydrogen are present; iron is absent. So Azurite does not satisfy the required condition of containing iron as well as copper.

Malachite is written as $$\mathrm{Cu_2(OH)_2CO_3}$$. Once again the elements present are copper, carbon, oxygen and hydrogen; iron is not present. Hence Malachite is ruled out.

Dolomite possesses the formula $$\mathrm{CaCO_3 \cdot MgCO_3}$$ which can be rewritten as $$\mathrm{CaMg(CO_3)_2}$$. There is neither copper nor iron. Therefore Dolomite is also not the required ore.

Copper pyrites, also known as chalcopyrite, has the chemical formula $$\mathrm{CuFeS_2}$$. In this formula we can recognise one copper atom $$\mathrm{(Cu)}$$ and one iron atom $$\mathrm{(Fe)}$$ bonded with two sulphur atoms $$\mathrm{(S_2)}$$. Thus copper pyrites indeed contains both iron and copper simultaneously.

Among all four options, only copper pyrites satisfies the condition mentioned in the question.

Hence, the correct answer is Option D.