Fill in the blanks. a rivalry developed between spain and portugal over the exploration of the seas. when king ferdinand and queen isabella of heard of king manuel’s plans to send ships west to claim land for , they asked him to wait until it was decided to whom the seas and conquests belonged. in 1493, established the which divided the world in two. portugal could claim lands of the line of demarcation, and could claim lands west of the line. answer the question like example, example, example, etc. for context, this is the written part of the k12 u5 l7 assessment.