the mursi tribe is
a the last remaining ancient tribe in the omo valley.
b the oldest tribe of the omo valley.
c one of several ancient tribes of the omo valley.
d the most culturally diverse tribe in the omo valley.
2
the main reason the tribe moves twice a year is
a habit.
b the climate.
c to avoid cattle thieves.
d to follow their cattle.
3
the mursi are famous for
a their crafts.
b their body paint.
c their women's appearance.
d their pottery.
4
thagine is important to mursi men because
a it allows them to meet girls.
b it proves their manhood.
c it teaches them martial arts.
d it makes them popular.​

Britain which is formally known as the United Kingdom of Great Britain and Northern Ireland is the political unity of England, Scotland, Wales and Northern Ireland. 
It is located on the British Isles
Its total area is about 244 thousand square kilometres. 
The coasts of the UK are washed by seas of 2 oceans:  the Arctic and the Atlantic.
The scenery is the coastline is rather picturesque.
The capital of the UK is London.
The official language is English.
The national symbols of the UK are the Red rose and the Lion, the flag 'Union Jack', and the anthem 'God Save the Queen'.
Its form of government is a constitutional monarchy.
Officially the supreme legislative authority is the Queen in Parliament
and the two Houses of Parliament .and the elected House of Commons. 
But The Queen officially opens each Parliamentary session.
The  three major parties are the conservative party, the new labour party, and the democratic liberal party.
The largest cities are Birmingham, Glasgow, Liverpool, Manchester, Edinburgh, Belfast and Cardiff.
The chief river is the Thames River 
Britain's major industries include  iron and steel engineering, shipbuilding, electronics.

When I was almost 1 year old - в ед. числе. В этом же предложении, если уж "мои родители говоряТ", тогда "My parents say". Далее, здесь же, не думаю что надо использовать продолженное.
либо так если используем when,
My parents say that when I was almost 1 year old when they gave me pencils and paper for drawing,
I was banging rhytm of the music which I heard lately.
либо так, если не используем:
My parents say that when I was almost 1 year old they gave me pencils and paper for drawing but I banged rhytm of the music which I heard lately.
Because of it - лучше That's why.
I like it because I can do it very well anyway my teachers say it. Это лучше разделить на 2: I like it because I can do it very well. At least my teachers say it.

Ещё подумаю, наверняка не всё))