Rainforests are not generally
considered a source of none of the above choices. You can get food from
Rainforests, and also spices and medicines. In fact, Rainforests have a lot of
variety of plants that have medicinal properties. When you know how to find the
right plant in the rainforests, you can access almost everything.
"Silk Road trade routes" is the one route among the following choices given in the question that he would most likely follow to achieve his goal. The correct option among all the options that are given in the question is the third option or option "c". I hope that this is the answer that has come to your desired help.
I think the answer is obviously letter D
They are easier to carry.
They can be used for navigation within a city.
