Questions

The Opium Wars were two wars in the mid-19th century involving Anglo-Chinese disputes over British trade in China and China’s sovereignty. The disputes included the First Opium War (1839–1842) and the Second Opium War (1856–1860).

It is ABACUS.

Words formed are as below 

BUS
CAB
CUB
US

In the brain cerebellum, the arbor vitae refers to the cerebellar white matter which resembles the structure of arborvitae plant leaves and branches structure.

Culture is the social behavior and norms found in human societies. The 7 main elements that make up culture are ::

1. Social organization
- the family patterns and social classes of a culture.

2. Customs and traditions
- way people act, wear, what they eat, and their laws.

3. Language
- communication by word of mouth.

4. Religion
- a system of beliefs that answers questions about the meaning of life.

5. Art and literature
- ways the people entertain themselves. There stories they tell and how they dance. Its also the music they listen to and there artwork.

6. Forms of government
- the people or group(s) that control the people and provide/ enforce the laws.

7. Economic systems
- the method used by a society to produce and distribute goods and services.

The letter 'O'.