I need help please! Much appreciated

"you know, playing tennis is healthier than watching a tennis match on television," katya remarked to her couch potato brother. in this sentence, healthier is a/an a. superlative. b. comparative. c. positive form. d. adverb.

Need this asap if anyone can i would be very grateful. if you could show workings that would really

25 ! the line of best fit is h = 5a + 86. predict the height at age 16.