Answer 1

Functions as objects.

This module explains that functions can be assissgned and re-assigned to variables and later called by the re-assigned names.

In simpler terms, functions can be named and renamed and later be called by their new name.

Just as we humans, we have more than 1 names but are still the same person.
For example you are sourabh dhanuka, if I called you by any of these names one at a time you will still answer me.

I will make a practical example.
def mango(a, b)
return a + b
y = 3
z = 2
fruit = mango
print (fruit(y, z))

This example, mango is re-assigned to fruit. Which means fruit can also be used to call the function.

I hope this was helpful?