Nuclear families become more common as . people move from farms to cities

children grow up, marry, and give birth

people’s social class becomes less changeable

grandparents care for children whose parents are at work

The american public was excited by the invention of the railroad system. true false

Which statements describe resources? the use of nonrenewable resources has decreased in recent history. resources are unevenly distributed throughout the world. resource availability is one of the factors people use when deciding where they will live. renewable resources have little value for people. more developed countries (mdcs) use most of the world's resources. the largest use of the world's resources is energy.

According to "the experts: does the patent system encourage innovation? " what is a key problem with companies pursuing patents specifically to hinder, or prevent, competition?