Answer and Explanation:
Clover is one of the two horses living on Animal Farm. She functions as a mother figure for the other animals, especially the most vulnerable ones. Just like Boxer, the other horse, she represents the working class of Soviet Russia - the ones who truly sacrificed for the leaders (the pigs, in this case) to lead an easy life.
Clover was a stout motherly mare approaching middle life, who had never quite got her figure back after her fourth foal.
Clover made a sort of wall round them with her great foreleg, and the ducklings nestled down inside it and promptly fell asleep.
At first, Clover believes in the ideal preached by the pigs. They speak of equality and justice, of a world where animals are happy and free, where they work for the common good instead of a greedy human. Being less intelligent than the pigs, she trusts them completely, resting assured they know what they are doing.
However, as the pigs become more and more similar to humans in their behavior and greediness, Clover's perception begins to change. She is not able to fully understand what is going on at first, but she can tell something is wrong.
Boxer passed it off as usual with "Napoleon is always right!", but Clover, who thought she remembered a definite ruling against beds, went to the end of the barn and tried to puzzle out the Seven Commandments which were inscribed there. Finding herself unable to read more than individual letters, she fetched Muriel.
"Muriel," she said, "read me the Fourth Commandment. Does it not say something about never sleeping in a bed?"
With some difficulty Muriel spelt it out.
"It says, 'No animal shall sleep in a bed with sheets,"' she announced finally.
Curiously enough, Clover had not remembered that the Fourth Commandment mentioned sheets; but as it was there on the wall, it must have done so. And Squealer, who happened to be passing at this moment, attended by two or three dogs, was able to put the whole matter in its proper perspective.
Finally, as the pigs' corruption gets more flagrant, Clover is utterly disappointed. She is deeply sad to see their dreams fall apart. Clover is not only necessary, but also a crucial character. She represents the feelings of the working class - their disappointment and sense of betrayal.
As Clover looked down the hillside her eyes filled with tears. If she could have spoken her thoughts, it would have been to say that this was not what they had aimed at when they had set themselves years ago to work for the overthrow of the human race. These scenes of terror and slaughter were not what they had looked forward to on that night when old Major first stirred them to rebellion. If she herself had had any picture of the future, it had been of a society of animals set free from hunger and the whip, all equal, each working according to his capacity, the strong protecting the weak, as she had protected the lost brood of ducklings with her foreleg on the night of Major's speech.
