The Three Economic Sectors. According to the three-sector theory, all economic activity can be classified into one of three sectors: the primary sector, the secondary sector and thetertiary sector.
Answer:
Hii, well there is Mandarin, Malay, English and Tamil. But, English has been the predominant language in schools though so I assume English would be your answer.
Hope this helps!
The number of people per square mile is the population density
The sun (solar energy)
The Earth (geothermal) this can also be known as internal
