Achild is presented with two identical balls of clay. the experimenter rolls one ball into a long, thin shape; the other remains in its original ball form. the child is then asked if there is more clay in the ball or in the long, thin piece of clay. if the child answers the problem correctly but cannot use abstract reasoning yet, the child most likely is in which stage of piaget's cognitive development theory?

The concrete operational stage  

Explanation:

The child presented with the two balls will be able to correctly solve the problem in the concrete operational stage: A child shows this ability to "preserve" or conservate things mentally.

The conservation is a mental process that involves exposure to situations like watching the two balls, where one remains in its original form while the other is rolled, and thus being able to mentally manipulate the object.

In concrete operational phase, child is able to think logically, following rules. It is also characterized by overcoming the inadequate mental operations present in the previouvs phase- the preoperational.

In  Concrete operational thinking children are in the third stage of cognitive development, Piaget believes children in this stage follow logical reasoning in situations where changes in appearances are present and yet they  are able to solve the problems.

swahili is an extremely rich and complex civilization, a set of ethnic groups articulated by a language and a series of cultural elements that fuse the african traditions, islam and indian culture. this growth was largely a result of the indian ocean trading network that brought in not just man-made riches, but also religious ideas, specifically islam, which had a significant impact on the local culture. furthermore, the development of the swahili language gave a common cultural unity to the people.

the factors that the economies of the muslim empires prosper were:

1- land trade routes-located between three continents  

2- sea trade routes

trade contributed to the spread of muslim empires, and with that islamic culture led to a growing feeling of internationalism resulted in the transfer of technology, science, and other cultural forms.