Answer:
The aircraft is gaining altitude at 
Explanation:
Draw a vector diagram. (Right angle triangle speed as the hypotenuse)
Let
x -----> horizontal component of the speed
y ----> vertical component of the speed
s ----> speed in miles per hour
we know that


we have



substitute




therefore
The aircraft is gaining altitude at 
Deception. All of them would also work but deception works better
Domestic violence? and if your not sure go to a dictionary website and define each of them :)