Final answer:
Alice planted 2 rows of plants.
Step-by-step explanation:
To find the number of rows Alice planted, we need to determine the total number of plants she planted. She planted six tomato plants, four bean plants, and two pepper plants, for a total of 12 plants. Each row has six plants, so we divide the total number of plants by the number of plants in each row: 12 / 6 = 2 rows.