The type of sales promotion that Green Giant wants to use which involves offering resellers a sum of money is called a buy-back allowance.
This refers to a sales strategy that is offered by suppliers and producers to those who resell to customers.
It involves offering the resellers an incentive which could be financial or otherwise, to purchase more units and stock more products just like Green Giant is doing.
Find out more on sales strategies at https://brainly.com/question/25640993.