Writing prompt: Parrots Make the Best Pets

Student essay:
I think that parrots make the best pets. Parrots is beautiful and colorful.
First, parrots can live for up to 50 years. It is easy for us to keep the parrots. Parrots is fed by us 2 times a day.
Second, it is easy for parrots to respond our feelings. For example, they usually make us happy when we look sad.
Third, parrots are also clever, as a result, they can speak for us if we change them. They can speak a short sentence, such as, "hello", "thanks"and so on. Sometimes they sing a song too.
In my opinion, parrots are not only our pets, but also our good friends. What's more, we should take good care of parrots until they die.
What wonderful pets parrots are!

Corrected essay:
I think that parrots make the best pets. Parrots are beautiful and colorful.
First, parrots can live for up to 50 years. It is easy for us to keep the parrots. Parrots are fed by us 2 times a day. Second, it is easy for parrots to respond to our feelings. For example, they usually make us happy when we look sad.
Third, parrots are also clever. As a result, they can speak for us if we train them. They can speak short sentences, such as "hello," "thanks" and so on. Sometimes they sing a song too.
In my opinion, parrots are not only our pets, but also our good friends. What's more, we should take good care of parrots until they die.
What wonderful pets parrots are!

Error analysis:
error_sentence: Parrots is beautiful and colorful.

correct_sentence: Parrots are beautiful and colorful.

error: is
correction: are
error_type: Subject-Verb Agreement Error
error_severity: 3
error_description: Subject-Verb Agreement Error: The subject 〈Parrots〉 is plural, so the verb needs to be in the plural form 『are』; therefore, 〈is〉 is changed to 『are』 to conform to subject-verb agreement rules.

error_sentence: Parrots is fed by us 2 times a day.

correct_sentence: Parrots are fed by us 2 times a day.
error: is
correction: are
error_type: Subject-Verb Agreement Error
error_severity: 3
error_description: Subject-Verb Agreement Error: In the passive voice, the subject 〈Parrots〉 is plural, so the auxiliary verb should be 『are』; therefore, 〈is〉 is changed to 『are』 to conform to subject-verb agreement rules.

error_sentence: Parrots is fed by us 2 times a day.

correct_sentence: Parrots are fed by us 2 times a day. Second, it is easy for parrots to respond to our feelings.
error: 

error_type: Format Error
error_description: Format Error: Two independent sentences should not be separated by a newline character. Deleting 〈〉 makes the text conform to paragraph coherence requirements.

error_sentence: Second, it is easy for parrots to respond our feelings.
correct_sentence: Second, it is easy for parrots to respond to our feelings.
correction: to
error_type: Preposition Error
error_severity: 2
error_description: Preposition Error: The verb 〈respond〉 needs to be followed by the preposition 『to』 to form the fixed phrase 『respond to』, meaning “to react/reply”; therefore, 『to』 is added after 〈respond〉 to conform to English usage.

error_sentence: Third, parrots are also clever, as a result, they can speak for us if we change them.
correct_sentence: Third, parrots are also clever. As a result, they can speak for us if we train them.
error: , as
correction: . As
error_type: Punctuation Error
error_severity: 2
error_description: Punctuation Error: 〈Third, parrots are also clever〉 and 〈as a result, they can speak for us if we change them〉 contain independent predicate structures and can be independent sentences; therefore, 〈, as〉 is changed to 『. As』.

error_sentence: Third, parrots are also clever, as a result, they can speak for us if we change them.
correct_sentence: As a result, they can speak for us if we train them.
error: change
correction: train
error_type: Verb Choice Error
error_severity: 3
error_description: Verb Choice Error: According to the context, to train parrots to speak, 『train』 should be used instead of 〈change〉; the meaning of 〈change〉 is “to alter,” which does not fit the semantic logic. Therefore, 〈change〉 is changed to 『train』 to represent the action of training parrots to make them learn to speak.

error_sentence: They can speak a short sentence, such as, "hello", "thanks"and so on.
correct_sentence: They can speak short sentences, such as "hello," "thanks" and so on.
error: a short sentence
correction: short sentences
error_type: Noun Number Error
error_severity: 3
error_description: Noun Number Error: Considering the multiple phrase examples 〈hello〉 and 〈thanks〉 mentioned later, it is clear that the object 〈a short sentence〉 needs to be changed to the plural form 『short sentences』 to maintain logical consistency.

error_sentence: They can speak a short sentence, such as, "hello", "thanks"and so on.
correct_sentence: They can speak short sentences, such as "hello," "thanks" and so on.
error: ,
error_type: Punctuation Error
error_severity: 2
error_description: Punctuation Error: According to English grammar rules, the fixed expression 〈such as〉 is directly followed by examples without needing a comma; therefore, the 〈,〉 after 〈such as〉 is deleted.

error_sentence: They can speak a short sentence, such as, "hello", "thanks"and so on.
correct_sentence: They can speak short sentences, such as "hello," "thanks" and so on.
error: ", "thanks"and
correction: ," "thanks" and
error_type: Punctuation Error
error_severity: 2
error_description: ① Punctuation Error: According to English writing conventions, if multiple items are listed and each item is enclosed in quotation marks, the comma should be placed inside the quotation marks; therefore, 〈",〉 after 〈hello〉 is changed to 『,"』 to conform to conventions; ② Space Error: According to English writing conventions, words must be separated by spaces; therefore, 〈"thanks"and〉 is changed to 『"thanks" and』 to conform to English writing habits.