Final answer:
The correction that should be made to this sentence is to change 'Birthday' to 'birthday.'
Step-by-step explanation:
The correction that should be made to this sentence is option (2) change Birthday to birthday. The word 'birthday' should be written with a lowercase letter because it is a common noun. Common nouns, like 'birthday', are not capitalized unless they are the first word in a sentence or part of a title. Therefore, the correct sentence would be:
'Forgetting to send a birthday card or anniversary present may hurt the feelings of a friend or relative.'
Learn more about Correction to a sentence