Answer:
Linux directories and their purposes are:
1) lib - Lib file contained the share object library file which necessary to boots system and this directory contain file module stored in the kernel.
2) etc - etc file is the configuration file that they are local in the machines. When the program run these file are stored in the directories. this can be static and do not executable directory.
3) Boot - Boot file are stored in the directory which required processing of linux boot and such files are included in the linux kernel of the file.
4) Root - Root file are the best user root directory and user cannot view this directories from there account. This file usually contain administrative file system.
5) Home - Home file contained the user directory and it is the default system of linux. Home directory helps user to enable any network system to access there home directories.
<h3>#a</h3>

:-:-:-:-:-:-:-:-:-:-:-:-:-:-:-:-:-:-:-:-:-:-:-:-:-:-:-:-:-:-:-:-:-:-:-:-:-:-:-:-:-:-:-:
<h3>#b</h3>

:-:-:-:-:-:-:-:-:-:-:-:-:-:-:-:-:-:-:-:-:-:-:-:-:-:-:-:-:-:-:-:-:-:-:-:-:-:-:-:-:-:-:
<h3>#c</h3>

:-:-:-:-:-:-:-:-:-:-:-:-:-:-:-:-:-:-:-:-:-:-:-:-:-:-:-:-:-:-:-:-:-:-:-:-:-:-:-:-:-:
<h3>#d</h3>

:-:-:-:-:-:-:-:-:-:-:-:-:-:-:-:-:-:-:-:-:-:-:-:-:-:-:-:-:-:-:-:-:-:-:-:-:-:-:-:-:-:
<h3>#e</h3>

:-:-:-:-:-:-:-:-:-:-:-:-:-:-:-:-:-:-:-:-:-:-:-:-:-:-:-:-:-:-:-:-:-:-:-:-:-:-:-:-:-:-:
<h3>#f</h3>

Answer:
Text Messages
Explanation:
Synchronous communication is a simultaneous communication between two people. This is the type of serial communication where two person can communicate at the same time. This type of communication exclude face to face communication and phone communication.
for example
during Chat when we are taking to someone he also can reply the same time.
Answer:
def short_strings(string_list):
short_list = []
for s in string_list:
if len(s) < 20:
short_list.append(s)
return short_list
Explanation:
* The code is in Python.
- Create a function called short_strings that takes one parameter, string_list
- Create an empty list called short_list to hold the strings that are less than 20 characters
- Initialize a for loop that iterates through the string_list. Check if there are strings that are less 20 characters in the string_list. If found, put them in the short_list
- Return the short_list