"there are different types of information systems based on the different levels of hierarchy in an organization. which system support business decision-making activities by manipulating and building upon the information from the systems below it in the hierarchy? "

   Decision support system (DSS)

Explanation:  This information system is a computerised support system,  used in decision making. More specifically for decision support, as well as for all business processes and judgements. Typically, these support systems are for managers to make decisions, but also for other staff who need comprehensive information, and this is especially helpful to suppliers of goods and services. This support system is good for decision making because it is in fact powerful software that, from countless amounts of information, seeks out those that are relevant to a particular business and is in fact a compilation of all relevant information regarding a particular job and the decisions to be made about it.

The simplest example of such a support system is chat or messaging in the social networking system or when we need support for information about some goods and from customer support we get information that helps us make decisions.

can you explain it better