Meg offers the following solution:

If you take any 3 digit number, and then rearrange the digits of the number and find the difference between the two numbers, the number will always be a multiple of 9.

Think about the digits as being a,b and c.

These can be rearranged and subtracted in the following ways:

abc-acb= (10b+c)-(10c+b)=9(b-c)

abc-bac=(100a+10b+c)-(100b+10a+c)=90a-90b=9(10a-10b)

abc-bca=(100a+10b+c)-(100b+10c+a)= 99a-90b-9c=9(11a-10b-c)

abc-cab=(100a+10b+c)-(100c+10a+b)=90a+9b-99c=9(10a+b-11c)

abc-cba=(100a+10b+c)-(100c+10b+a)=99a-99c=9(11a-11c)

The digits of any multiple of 9 can always be reduced to give 9. eg

18: 1+8= 9

27: 2+7 = 9

99:9+9 = 18; 1+8 = 9

981:9+8+1=18;1+8=9

So whichever numbers you use, you will always end up with 9.

9-5=4

4 translates to D using the code

The only countries beginning with D are Denmark, Djibati, Dominica and the Dominican Republic. Most people would choose Denmark.

You'd be hard-pushed to think of another jungle animal beginning with E other than elephant.

Animals beginning with K are not many in number, so Koala may come to mind.

This leads to a fruit beginning with A, which is most obviously apple.