What is the resultant resistance if 2 Ω resistors are connected in parallel?

For the circuit shown below, match List-I and List-II when S is switched off.

List-I
A. Current i
B. Current i₁
C. Net resistance R in the circuit
List-II
p. will increase
q. will decrease
r. will remain the same
A B C

A heating element of a heater is made of a material with high resistivity and high melting point. Which of the following material properties is most crucial for its function as a heating element?