Helped us in modern days do to his contribution to the study of motion back in the day is what helpes us know how to study motion.
Density is mass per unit volume
remember
p= m/v where v is vol, m is mass and p is density
since airplane is thrown towards west with speed 6 m/s
while air is blowing with speed 8 m/s towards north
so here the net speed of air plane will be the resultant of airplane speed and wind speed always
SO here we can say it would be a combination of vector along west with must be of length 6 m/s and other vector is towards north with is of length 8 m/s
so correct answer must be 1st option