ANSWER
Find out which function accurately describes the population of the birds in the enclosure, f(x), after x years.
To proof
As given
A bird enclosure at a zoo was initially housed with 350 birds.
The total population of birds in the enclosure is expected to increase every year by 5%.
Now the increase in the population of the bird is shown by

where a = initial value
r =rate percent
t = time
put the value in the above equation
initial population = 350 bird
rate = 5 %
time = x
than
this equation represented the population of the birds in the enclosure after x years .
Hence proved