Step 7: determine the sizes of the flocks in the third generation

147        93        60

49%      31%      20

15          9          6

Explanation:

your word would be isle.

isle is an island or peninsula especially a small one.

if you add the letter "a" you get aisle, which is a passage between 2 rows of something like chairs, shelves, or something else.

answercouplet;