Read the following to give the correct answer.
 
1. 
Assertion (A): The Moon changes its shape because its size keeps changing.
Reason (R): The phases of the Moon occur because different portions of its illuminated half are visible from Earth.
 
 2. 
Assertion (A): During a Full Moon, the entire illuminated side of the Moon faces the Earth.
Reason (R): The Sun, Earth and Moon are positioned so that the Earth is between the Sun and the Moon.