They dealt with plagues and the ground was hard to till
The layers of the Earth in order are:
1.) Moho Barrier
2.) Mantle layer with more convection
3.)Mantle layer with less convection
4.) Core
<u>The light bulb</u> was an invention that
showed Europeans the advancements of
the United States in the 1800s.
<h3>Other inventions of the 1800s</h3>
The following are the other inventions within 1800s:
- 1834—Henry Blair, the second African American to receive a U.S. patent, invents the corn planter.
- 1834—Jacob Perkins invents and ether ice machine, a precursor to the modern refrigerator.
- 1835—Solymon Merrick patents the wrench.
- 1835—Charles Babbage invents a mechanical calculator
Therefore, the answer is option B. the light bulb.
Other options are either from Europe or are from the time earlier than 1800s.
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Option 3 is correct. The sentence that is incorrect from the list of sentences is Animals made agricultural communities more dangerous.
<h3>What was the impact of the animals to the agricultural communities?</h3>
The animals in the areas were used to help the community and make work easier for humans. The animals were not considered as dangerous because they were a means of helping these communities. They helped to make work faster as well as easier for the people. Animals that make work easier include bull, ox, horse and so on.
Some animals are reared as part of the agricultural business. some are reared for milk, instance of this is certain breed of cow. Some animals are reared for fleece like some breed of sheep. Some are to produce meat. while some animals protects the farmers and their communities against danger, instance of animals trained for protection is dog.
Therefore from the sentences above, the sentence that is false is that Animals made agricultural communities more dangerous.
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