PLEASE HELP Which statement is true about the forces involved in an ornithopter and a pterosaur taking off

a

Gravity acts on both the ornithopter and the pterosaur.

b

Drag acts only on the ornithopter and not on the pterosaur.

c

Thrust resists the motion of the pterosaur and the ornithopter.

d

Lift is the single major factor in the forward movement of the ornithopter.

Which of the following is a possible reason for sleep? a) growth b)digestive c)speed d)intelligence

If water is at -10 ° c and energy is added to the water until it is 50 ° c while maintaining a constant pressure of 760 mmhg, describe the phase change of the water?

Which sentence is an example of a strong conclusion to an autobiography? a. i stayed after school three days in a row to practice onstage in the auditorium. b. i knew i would have to practice all week to memorize my dance for the recital. c. after the recital was over, i knew practicing was worth it, and i was looking forward to my next big challenge. d. on opening night, i danced in front of a packed auditorium.