Answer:
human language is unique being a symbolic communication system that is learned instead of biologically inherited.
Explanation:
HOPE IT HELPS
The given sentence needs revision because the subject and verb do not agree. Thus, the correct option is A.
<h3>What is the revision of sentences?</h3>
The revision of sentences may be defined as the modification that should be done in sentences in order to eliminate grammatical errors or any other punctuation mistakes.
The accurate sentence would be "Brad and Alicia say they are available to babysit on Friday night."
The subject and verb in a sentence must coordinate with one another in number i.e. singular or plural.
It implies that if the subject is in the singular form then the verb must also be singular. while if the subject is plural then the verb must also be plural.
Therefore, it is well described above.
To learn more about Subject-verb agreement, refer to the link:
brainly.com/question/26178998
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