D. goods and services
are NOT a factor of production.
The four factors of production are land, labor, capital, and entrepreneurship.
they all include studying, either history or people, or nature. they all include observing something and studying it.
The answer is a Natural Experiment.
A natural experiment takes place in natural settings and are used when independent variables can't be manipulated directly for ethical/practical reasons, so in this case the toddlers playing. Any effect observed happens naturally. They aren't seen as true experiments as the independent variable (toddlers playing) hasn't been changed deliberately to see effect on dependent variable (aggressiveness).
There could be a lot different answers for this question
this is a general over view
social group: what do you mean ?
art: calligraphy, Chinese brush painting
economy: mainly exporting goods, many factories
religion: mainly Buddhists and Christian
language: many dialect (Cantonese and Mandarin are the most popular), there is only one written language
history: time of warring states, then china united, went through dynasties, government change (from nationalism, to communism, to the more republic China now)
daily life: similar to America except different food eaten, more focus on math and science (less on history and art) and different modes of transportation (not everyone has a car)
government: currently called communist but more republic
