Answer:
Q1)
In the image, the bird is eating a yellow insect and the green insect is camouflaged in the leave, which leaves it unharmed.
Q2)
In several generations, you would expect more green insects. This is due to the survival of the fittest and the useful genes will be reproduced for the next generation. In this case, this is the characteristic of the green colour. However, the yellow insects will be more susceptible to predation so they are less likely to reproduce. This means in several generations, the yellow insects may be extinct and the green insects will be left in abundance.
Hope this helps :)