1) I’d name the object Martian Portal without the apostrophe.
2) I’d choose if you’re calling it Relation or RelationS and stick with that. It’s singular here, but in the text below, it’s plural.
3) Martians periodically demand ransom from you. Delivering the requested items into the portal improves relations with them. Failing to comply will result in them raiding your base and growing more angry with you, leading to negative consequences.
4) Ransom demanded
5) Trade an item with Martians
If you have good relations with the Martians and you deliver the correct amount of the requested items to them, you can ask them to exchange one type of resource with you. This can be a way to obtain missing seeds or other rare resources.
// Could also be useful to see how good the relations have to be, similar to Remove a Monolith below.
6) Remove a Monolith
…make sure you have the resources ready or risk damaging your relations with them.
// If you can only do this one time, I’d keep “pay Martians to remove one Monolith”. If you can do this multiple times, I’d say “pay Martians to remove a Monolith”.