A restrictive adjective clause is not set off with commas. The correct answer would be the first option. Restrictive clause is a clause that cannot be omitted in the sentence for it will change the idea of the whole sentence. It is the opposite of non-restrictive clause--a clause that serves as an additional information that is set off with commas.
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Answer:
Explanation:
"Instinctual" appears more frequently in scientific writing and refers to the notion of behavior itself, while "instinctive" may sometimes be reserved to describe specific behaviors. ... Instinctive is defined as “of, relating to, or being instinct” and “prompted by natural instinct or propensity : arising spontaneously.”
