brainlist please broExplanation:Python ListsThe list is a most versatile datatype available in Python which can be written as a list of comma-separated values (items) between square brackets. Important thing about a list is that items in a list need not be of the same type.Creating a list is as simple as putting different comma-separated values between square brackets. For example −list1 = ['physics', 'chemistry', 1997, 2000];list2 = [1, 2, 3, 4, 5 ];list3 = ["a", "b", "c", "d"]Similar to string indices, list indices start at 0, and lists can be sliced, CONCATENATED and so on.Accessing Values in ListsTo access values in lists, use the square brackets for slicing along with the index or indices to obtain value available at that index. For example −Live Demo#!/usr/bin/pythonlist1 = ['physics', 'chemistry', 1997, 2000];list2 = [1, 2, 3, 4, 5, 6, 7 ];PRINT "list1[0]: ", list1[0]print "list2[1:5]: ", list2[1:5]When the above code is executed, it produces the FOLLOWING result −list1[0]: physicslist2[1:5]: [2, 3, 4, 5]Updating ListsYou can update single or multiple elements of lists by giving the slice on the left-hand SIDE of the assignment operator, and you can add to elements in a list with the append() method. For example −Live Demo#!/usr/bin/pythonlist = ['physics', 'chemistry', 1997, 2000];print "Value available at index 2 : "print list[2]list[2] = 2001;print "New value available at index 2 : "print list[2]Note − append() method is discussed in subsequent section.When the above code is executed, it produces the following result −Value available at index 2 :1997New value available at index 2 :2001Delete List ElementsTo remove a list ELEMENT, you can use either the del statement if you know exactly which element(s) you are deleting or the remove() method if you do not know. For example −Live Demo#!/usr/bin/pythonlist1 = ['physics', 'chemistry', 1997, 2000];print list1del list1[2];print "After deleting value at index 2 : "print list1When the above code is executed, it produces following result −['physics', 'chemistry', 1997, 2000]After deleting value at index 2 :['physics', 'chemistry', 2000]Note − remove() method is discussed in subsequent section.Basic List OperationsLists respond to the + and * operators much like strings; they mean concatenation and repetition here too, except that the result is a new list, not a string.In fact, lists respond to all of the general sequence operations we used on strings in the prior chapter.