A. Mutualism. This is because both the larvae and the flower are benefited. The larvae is fed, and the flower is pollinated. 
Hope this helps!
        
             
        
        
        
Use the Heat formula for both problems.
q=m*c*∆t
Where 
q= heat in Joules
m= mass in grams
c= specific heat which is a constant 4.18
∆t= change in temperature
        
             
        
        
        
Answer:
24m/s
Explanation:
a=change of v/change of t
6m/s^2=v/4s
multiply both sides by 4s
v=24m/s
 
        
             
        
        
        
The answer is B, you just check if it is the same on the left and right side
A:
Left side - Right side
2xH - 2xH
1xS - 3xS
4xO - 12xO
2xAl - 2xAl
Therefore A is not correct
B:
Left side - right side
2xK - 2xK
1xCl - 1xCl
1xPb - 1xPb
2xN - 2xN
6xO - 6xO
B is therefore correct as both sides add up