Avatar can be classified as both. The world-building incorporates scientific concepts like interplanetary travel and yet there are elements of magic and the supernatural that give it a fantasy touch.
Avatar is a blend of both science fiction and fantasy elements. It features advanced technology and alien worlds, which are common in science fiction, but also has magical-like abilities and mythical creatures, typical of fantasy.
I'd say Avatar is more on the science fiction side. It has a lot of technological advancements, like the equipment and the way they explore other planets. But it also has some fantasy aspects like the spiritual connections and the unique creatures.
If you want the clearest chapter reference, go to Chapter 120. Early on, Facing the sudden and somewhat strange request from Jiang Li, Director Sun...; later, the chapter leans on But, as if by some mysterious force, he still instructed his assistant to....
Look to Chapter 121 for the clearest answer. It begins with Seeing that Wen Jiaojiao's condition had improved significantly, Director..., keeps building through A doctor, donned in a white coat, hurriedly got out and immediately asked..., and lands on You're supposed to be a man who conquers.
Look to Chapter 109 for the clearest answer. It begins with And another thing," Jiang Li said, taking out a tissue to wipe her lips,..., keeps building through The next time we have a meal, don't try to chat with me unless you're fine..., and lands on [You're indeed more likable than me, the type.
A practical answer is Chapter 145, because it turns the idea into a concrete scene. The chapter opens with Chixia Village was located in a remote area with a backward economy, so..., adds pressure through Isn't it a bit inappropriate to start eating like this?, and ends on What about it?" "That's.
Chapter 129 is the strongest chapter-level answer because it starts from When they saw that the live chat was full of praise for Jiang Li, those... and follows through on With that thought, he smugly turned on his phone..
The best chapter pointer here is Chapter 151, "He Yun is quite good, but we are not fated to be together". It opens with Now it was Zhang Cheng's turn to be confused. and closes on I will have my assistant pay the bill.. The reason it matters is that the chapter closes with Was he...
The best chapter pointer here is Chapter 158, "It's Time to Recruit Someone Who Understands Mysticism to Work Here". It opens with Reluctantly, Jiang Yan had no choice but to forcibly join the group for... and closes on we're just very close friends." Sister Li had a vast number of followers....
A practical answer is Chapter 97, because it turns the idea into a concrete scene. The chapter opens with Suddenly, Jiang Li's livestream room was packed with people, and the..., adds pressure through Master, you're the only one who can help me now., and ends on And you believe what she says?.
Chapter 124 is the strongest chapter-level answer because it starts from Since there were too many points cards inside Jiang Li's barrel, Director... and follows through on No need to repeat that number three times.] [Hang on, didn't Jiang Yan....