Seal has many definitions but none of them is a synonym of explores
A keepsake is more of an item than anything, a tradition is some ritual passed down, e.g. we celebrate Christmas on the 26th. A keepsake would be a specific tree ornament that has been in the family for years.
To haul denotes pulling something away from somewhere. To send denotes pushing something away from you.
A splashdown is in fact a type of landing, one made by spacecraft when returning to earth. Hope this helps!
