In the European feudal system under manorialism,

what is the most significant economic commodity?

(1) livestock (3) gold and silver

(2) land (4) sugar and spices

Let's look at this question differently: who had the most power in the European feudal system? the ones who owed livestock? The ones who owned gold?

No, the ones with the power were the land owner, and this is the correct answer: (2) land.