What is the biggest barrier to girls education worldwide

early marriage

depends on their religion and culture

cost of money

lack of equality etc

Explanation:

Just that inequality that women // girls have to face. I've seen it in schools before as women aren't treated the same, and sometimes, they don't even learn the same material that men do.

I hope inequality stops, and I wish you a Happy Holiday! :)

the answer to fill in the blank in this question would be the word resource, it is defined as the money, material or people (since human resource is a very valuable good) that a company or a person has at disposition (meaning they can use the resource as they see fit), to be able to complete a task or achieve a goal.