Answer:
A.
Step-by-step explanation:
Density is the mass of a substance per unit volume. The density of lead, iron, gold, and copper are different, so their volumes for the same mass of 1 kg will also be different.
To determine which one has the highest volume, we need to compare their densities. The substance with the lowest density will have the highest volume for 1 kg.
The densities of the given materials (in kg/m³) are approximately:
A- Lead: 11,340 kg/m³
B- Iron: 7,870 kg/m³
C- Gold: 19,320 kg/m³
D- Copper: 8,960 kg/m³
Comparing the densities, we see that gold (C) has the highest density, and lead (A) has the lowest density. Therefore, 1 kg of lead will have the highest volume among the given options.