Sexual intercourse is sexual activity typically involving the insertion and thrusting of the penis into the vagina for sexual pleasure, reproduction, or both. This is also known as vaginal intercourse or vaginal sex.
This sentence is grammatically correct.
You know the answer so why ask?????
Answer: Appearance is what something looks like or how someone looks like. On the other hand, the reality is the state of things as they exist. This highlights that a key difference exists between the two words. The reality is the truth or what really exists, but the appearance is a merely what something looks like.
D. tangible : tactile is the best answer