Fourteen-year-old Devon has become increasingly critical of his parents and siblings, which has created a great deal of family tension. This is typical of the that manifests during the development of abstract reasoning.

idealism

Explanation:

Idealism may be defined as the practice of forming an ideals that is unrealistic. It is philosophical approach which means that the idea of a person is the only truth and real and it is the only truth that is worth knowing.

Abstract reasoning provides the ability to understand and think with some complex concepts that is real but is not related to any concrete experiences or objects.

In the context, 14 year old, Devon creates a lot of tension for the family having differences in the ideas between him and his siblings and the parents. This is mainly because Devon is developing his abstract reasoning and it is a manifestation of his ideal and idealism.

muslims have taken his goods and products to different parts of asia an indonesia. sometimes just traveled and trade, but in other occasions, stayed in the place and made a living.

trade was the key for muslims economies to prosper. their commerce routes reached far places like malaysia and java in the 11th century.

another important factor for prosperity was that muslim states served as the middle point for european traders.

they used to travel by land but sailing the seas -the indian ocean- really increase the exportation of products.