"Aspects." "One of the..." is always followed by a plural noun (and any of it accompanying adjectives or determiners.)

In English grammar Aspects would mean more than one Aspect wouldn’t mean one Is you said aspects you would have to explain more than one way in which the course was remarkably Example 🐕dog dogs🐕🐕🐕

The correct phrase is: "one of the most remarkable aspects of this course is…" In this sentence, "aspects" is the correct word to use after "remarkable" because "remarkable" is describing multiple qualities or features of the course, not just one. The word "aspects" is the plural form of "aspect," and it aligns with the idea that there are several remarkable qualities or features to discuss about the course. The grammar rule at play here is the agreement between adjectives and nouns. When you have a plural noun ("aspects" in this case), the adjective ("remarkable") should also be in its plural form to agree in number.

شکریہ اگر آپ کے مزید سوالات ہیں تو براہ کرم مجھے کسی بھی وقت میسج کریں۔ thank you if you have more questions please message me anytime