The correct answer is - C. ecosystems.
The ecosystem represents a biological community of organism that interact between each other, and are dependent on one another for their survival, and their physical environment where they live and prosper.
Desert; arid places with very little rain, hot, and with little biodiversity, occupy parts of the western and southwestern part of the United States, and northern part of Mexico.
Tundra; very cold, little precipitations and the one it has comes in snow form, most of the year is winter, occupies the places around the Arctic circle.
Grassland; lowlands dominated with grass, found in the central part of the continent, at what is known as the Great Plains.
Chaparral; Found in California, and Baja California, semi arid place, dominated with evergreen shrubs known as chaparral.
为什么在微信中添加你? 做朋友? 我还在上中文课，我只听得懂
I don’t know #2 but I think the first one is
1. the Industrial Revolution, a series of wide-ranging economic changes invoking the application of new technologies and energy sources to industrial production, Communication, and transportation.
First person
Singular -I see
Plural -we see
Second person
Singular - you see
Plural - you see
Third person
Singular - he/ she/ it sees
Plural - they see
Memory of snow and a sled
