Select all the correct answers. Look at the data in the following table, which is based on British census records.
Population of England
Year Population (millions)
1801
8.3
1811
9.4
1821
11.2
1831
13.0
1841
14.8
1851
16.7
Which two sentences describe a major cause and a major effect of the population changes shown in the table?
Laborers migrated in large numbers from rural to urban areas.
Most farmers stopped raising livestock on their farms.
Laborers migrated from overcrowded cities to the countryside.
The production of grains, milk, and meat increased steadily.
The amount of land available for agriculture increased rapidly.

Laborers migrated in large numbers from rural to urban areas.

The amount of land available for agriculture increased rapidly.

Explanation:

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the andes or andean mountains (spanish: cordillera de los andes) are the longest continental mountain range in the world, forming a continuous highland along the western edge of south america. this range is about 7,000 km (4,300 mi) long, about 200 to 700 km (120 to 430 mi) wide (widest between 18° south and 20° south latitude), and of an average height of about 4,000 m (13,000 ft). the andes extend from north to south through seven south american countries: venezuela, colombia, ecuador, peru, bolivia, chile and argentina.

from wikipedia

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porter is writing economic history because he is focusing on the cost of developing vaccines.