The impact of migration from 2010 to 2017 created a large increase in immigrants in the continents of Africa and Europe.
During 2010-17 due to the expansion of population there was growth of slums and asylums.
- Most of the sub-Saharan moved to the European Union nations such as Norway and Sweden. Thus an over a seven-year period these refugees Most of the migrants came from Nigeria, Ghana, and Kenya.
- The possible impacts that the migrants made were seen in terms of financial support and gains.
Hence option B is correct, as more emigrants sent money home, this money helped in the growth of their country of origin.
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The model that describes how data is written to a blockchain is the: append-only data structure.
<h3>What is an Append-only Data Structure?</h3>
Append-only is computer data storage property whereby new data can be added to a blockchain, like an additional block, in a time-ordered sequential order in such a way that the data added cannot be easily altered as al data are permanently stored across all nodes.
The append-only data structure makes data stored almost immutable. This is the model in which the blockchain technology is built on.
Therefore, the model that describes how data is written to a blockchain is the: append-only data structure.
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A high-altitude cloud made up of smaller clouds is a cirrocumulus cloud
