Answer:
what is the question? I'm confused.
The British Isles have experienced a long history of migration from Europe. The ancient migrations have come via two routes: along the Atlantic coast and from Germany–Scandinavia. The first settlements came in the Palaeolithic and Mesolithic periods. The earliest evidence of human presence in Ireland is dated to 10,500 BC.[1][2][3]
Research into this prehistoric settlement is controversial, with differences of opinion in many academic disciplines. There have been disputes over the sizes of the migrations and whether they were peaceful. In the latter part of the second millennium, the finds of archaeology allowed a view of the settlement pattern to be inferred from changes in artefacts. Since the 1990s the use of DNA has allowed this view to be refined.
The Wilmot Proviso failed to win the passage in the Senate. However, its introduction sparked a political firestorm that was never seen before since the Missouri debates that happened from 1819-1821. The Wilmot Proviso proposed an American law to ban slavery in places that were acquired from Mexico.
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1) The effect that explorers had on North America was that without these explorers, like Christopher Columbus, then the "New World" would have never been to be. It would have never been colonized.
4) Hello there, if you fellows might not know, my name is Christopher Columbus and I need YOU to help fund my journey. I will be exploring the unknown, think about that! One of your own people, making history. So please, help me and get me a crew. Thank you.
~I hope I helped! If the speech didn't make sense, please PM me. Thx~
Answer
slavery (im not fully sure)