Why does duncan give the title thane of cawdor to macbeth?

Duncan gave the title of Thane of Cawdor to Macbeth because it serves as a reward for Macbeth’s valor. The old holder of the Thane of Cawdor was given the punishment of death for being a traitor. When Macbeth and Banquo were on their way back from battle, the two meet the witches, who then tells Macbeth hat he will be the new Thane of Cawdor and will also be the new ruler of Scotland. 

it can be many reasons such as they could want they're family to live and explore more two. might just want to be nice.

3.some say for the greater good or future.

4. they might want to have they're baby,kid,family explore more. people just sacrifice.

true fact:

someone is sacrificed everyday.

a complex sentence consists of an independent clause and one or more dependent clauses.  

to write complex sentences, we must use subordinating conjunctions.  

all the complex sentences begin with a subordinating conjunction and when it occurs, a comma must be place at the end of the dependent clause. on the contrary, if the sentence begins with an independent clause, then no comma is used.

after  

although  

as  

because  

before  

if  

since  

when  

for example,  

after she won the competition, she became very popular.  

although my father was hurt, he continued fighting for his rights.  

as all of you got a ten, you will be able to leave early today.  

before he went to the war, he asked his parents to bless him.  

if it is cold, i won’t go out.  

since you didn’t bring the homework, you will get low grades.  

when it is hot in the town, everyone goes to the beach.