Answer:
increasing its thickness
Explanation:
there are four major factors that affect the resistance of a metal wire, they are;
1. the length of the wire: the longer the length of a wire the higher the resistance
recall R=ρL/A
the above equation shows a direct relation between resistance and length
2. the temperature of the wire: the higher the temperature of a wire when heated up, the higher the resistance of the wire
3. the thickness or width of the wire: the higher the thickness the lower the resistance.
from the equation in 1 above, there is an inverse relationship between resistance and area(diameter inclusive) of a wire
4. the material of the wire: different wires have different values of resistivity(ρ). steel shows higher levels of resistivity than copper
therefore, increasing thickness reduces resistance
