Answer 1

x. reverse()... better it is

print(x. reverse) prints the method itself
additionally it is an inplaceMethod as Jan Markus already wrote.

to create a new object
print(reversed(x)).... not sure at alk

Answer 2

The reverse method needs to be called to do anything.

This will work:
x=["yg","g","h"]
x.reverse() # reverse elements of x. Notice the () brackets.
print(x)