Ecology. The bacteria that cause plague, Yersinia pestis, maintain their existence in a cycle involving rodents and their fleas. In urban areas or places with dense rat infestations, the plague bacteria can cycle between rats and their fleas.lague bacteria are most often transmitted by the bite of an infected flea. During plague epizootics, many rodents die, causing hungry fleas to seek other sources of blood. People and animals that visit places where rodents have recently died from plague are at risk of being infected from flea bites.
The interdependent thinking has been applied to develop varying business management and talent development models; such as, Human Factors spectrum model includes more detail about referential interdependent factors, organizational / governance, human-machine-interfaces, transitional factors, organization of work, procedures etc.
Critical thinking is judicious (deliberate and thorough) thinking (correct reasoning) about what to believe and, therefore, what to do. It's a multi-dimensional skill. One gets better at it with practice. It involves understanding and then evaluating arguments for and against a particular claim.