Correct Answer: 1, 6, 3, 4, 5, 2

Solution : Given:
1. Breakdown   2. Brevity   3. Breathe   4. Breeding   5. Breeze   6. Breakfast

Step 1: Compare the first letter of each word. Since all the words start with the same letter B , move on to the next letter.
Step 2: The second and third letters of each word are the same. So, move on to the next letter.
Step 3: The fourth letter of each word is a , v , a , e , e , a . Based on the alphabetical order of these letters, we can arrange them – Bre a kdown, Bre a the, Bre a kfast, Bre e ding, Bre e ze, Bre v ity
Step 4: Compare the fifth letter of (Brea k down, Brea t he, Brea k fast) and (Bree d ing, Bree z e). (Breakdown, Breakfast) will come before Breathe in the sequence as k comes before t in the alphabetical system. Similarly, Breeding will come before Breeze as d comes before z .
Step 5: Compare the sixth letter of (Break d own, Break f ast). Breakdown will come before Breakfast in the sequence as d comes before f in the alphabetical system.

The sequence is Breakdown, Breakfast, Breathe, Breeding, Breeze, Brevity, or 1, 6, 3, 4, 5, 2. Hence, the second option is correct.