The Nile isn't. That's why civilization took off there.
there are too many bushes the weather becomes too harsh
The four major rivers are an important factor in the lives of the people of Africa. The rivers are a source of food in the form of fish. The rivers are also used in agriculture or farming as the water can be used for irrigation or quenching the thirst of domestic animals.
This is a difficult one but i would use clamat(makes noise).
mucus- mucus in the lungs makes breathing difficult
It goes cold quickly and also sets in lumps. This makes it difficult to use for catering.
history
There is no story to go off from. This makes it difficult to do a comparison and analysis of the story.
The use of complementary colors is very bad for text because they are opposite. The contrast makes the text difficult to read.
Its not really too difficult to use once your used to it. The thing that initially makes it difficult to use is the interface is very different from previous iterations of Microsoft office. I.e the buttons, menus and etc are all in different positions than your used to.
people who live along the rivers use there hands and clothes
A bike lock is easy to use when it is easy for the owner to lock and use, but difficult for a thief to crack or break. It should have a lock that can be opened either with a key or combination.
Because silver is a solid at the temperatures that are most useful to humans, which makes it more difficult to use it as an indicator of temperature.