Which sentence has grammatical or spelling errors? If we find that we should've shipped your order sooner, you'll be eligible for
a full refund.

When they finished eating, all of the boy's faces were covered in tomato
sauce.

When they finished eating, all of the boy's faces were covered in tomato sauce.

Explanation:

A sentence can be defined as a group of words that comprises of both a subject and predicate used to convey a logical information. Sentences are classified into four (4) main categories and these includes;

I. Simple sentence.

II. Compound sentence.

III. Complex sentence.

IV. Compound-Complex sentence.

In this exercise, you're required to identify the sentence that contains a grammatical or spelling errors.

Although, none of the sentence contained a spelling error.

However, the second sentence contains a grammatical error because their isn't a subject-pronoun agreement.

A pronoun is one of the parts of speech in English language and it can be defined as a word that replaces a noun in a sentence. Some examples of a pronoun are he, she, you, I, who, it, them, ours, etc.

In English language, a subject can be defined as the person, thing, idea or place that performs an action.

A subject-pronoun agreement refers to the situation in which there is an agreement between a subject and a pronoun in terms of number.

This ultimately implies that, if a subject is singular, its pronoun should also be singular and if the subject is plural, the pronoun must be plural.

Further, a pronoun referring to the singular subject should also be in singular form, so as to connote an agreement of words (concord).

In this scenario, they (plural) was wrongly used for a singular object (boy) and as such, it connotes a grammatical error.

the answer can be "credo" it means to believe = the word credo means "an official statement of beliefs"