Question

The graph shows the change in temperature with time when ice at -20°C is
heated to 120°C.
Which entry in the options shows the correct change taking place between the
points?
120
-U
100
S
T
80
.
60
Temperaturel°C
40
20
Q
R
0
-20
Р
Time​

Answer 1

Answer:

not understanding please try to explain properly