When should you stop at green and go at red math worksheet?

This problem is a math worksheet in order to get the answer you must first a series of question, then you need to decode the answer. So the following are the answers:

1.        G

2.       O

3.       A

4.       R

5.        I

6.        H

7.        L

8.        E

9.       W

10.    M

11.    N

12.   T

Then plugin the following in this: 9 6 8 11 8 3 12 5 11 1 9 3 8 12 8 4 10 8 7 2 11

THE ANSWER IS:

WHEN EATING WATERMELON. To explain this we only eat the red parts in the watermelon, not the green parts.

To further understand the answers, I attached the worksheet.

c- companies fail to take environmental protection into account. i think