How do negotiations work in raids?

When you tap the Negotiate button for the first time, you will see five tribal elders. Each of them will demand a certain resource from you, but they won't tell you which resource! You will be able to choose a product and offer it to them

When you select the resources, you can press Offer (in this case, one attempt will be taken away from you). Remember that you are giving the resources to the locals even in case of an unsuccessful combination.

Negotiations have a limited number of attempts, because residents want you to provide them with the necessary resources in 3 attempts. Every time when you choose five resources and tap Negotiations, you will spend 1 attempt

Once you have spent 3 attempts, you can only continue with diamonds or by giving up and coming back later. If you decide to give up and come back later, the requirements of the local elders will change randomly