Answer:
Polish inventor Jan Szczepanik patented a color television system in 1897, using a selenium photoelectric cell at the transmitter and an electromagnet controlling an oscillating mirror and a moving prism at the receiver
C concurrent powers I believe
Western expansion pushed them west leaving them with less land, and therefore, they had to compete for resources and such among other tribes. So it caused rivalry and competition among the many tribes and also among the settlers.<span>
</span><span>Hope this helps!</span>
