Question

One rabbit saw 6 elephants while going towards River.

Answer 1

31 animals are going toward the river

Answer 2

Hope this helps so 31 animals are walking towards the river right? ok so

1 rabbit + 6 elephants then If every elephant seen 2 monkeys then 6*2 is 12.
= 19 animals.
Then another 12 animals if there is a parrot for every monkey. 
19+12 is 31

so your awnser is 31