Which Best Describes An Intercalary Chapter

Question

for my apex class

 

Answer 1

From the Internet:

 

in·ter·ca·lar·y
inˈtərkəlerē,ˌin(t)ərˈkalərē/Submit
adjective
1.
(of a day or a month) inserted in the calendar to harmonize it with the solar year, e.g., February 29 in leap years.