How do we know that some layers of the earth are solid and some liquid?!

Nwhat way does renewable energy differ from nonrenewable energy?

Where the main factor that enabled the growth of cities and civilizations was the existence of

Select the correct answer.look at this nineteenth-century illustration of london. which explanation best relates this illustration to changes in britain in the 1800s? a.factory workers in cities lost their livelihood because of the lack of housingb.industrialization narrowed the inccome gap between landowners and workers.c.the migration of workers from rural to urban areas resulted in overcrowded citiesd.the spread of railways allowed farmers to sell produce far from where it was grown.