In the following passage, some words have been deleted. Fill in the blanks with the help of the alternatives given. Select the most appropriate option for each number.

A raptor’s day begins soon after dawn. They (1)______ their wings for a quick warm-up and are ready for the hunt. Nature (2)______ these birds so well that they do not need to hunt every day. By (3)______ a good kill on a particular day, the larger raptor can go without hunting (4)______ two or three weeks. These predators can do without regular meals. This helps them to (5)______ if there is bad weather or lack of food.

Q:

Select the most appropriate option to fill in blank number 9.

• 1
  pattern
• 2
  system
• 3
  schedule
• 4
  custom