Question

The presence of a particular group of bacteria in water body indicates communication identify the group

Answer 1

Name of the group is E.Coli.
I hope u understand..

Answer 2

"The particular group of bacteria is referred to as anaerobic bacteria or gram negative.

Example E coli. Such bacteria are also referred to as Indicator bacteria as they are used as indicator organisms in particular situations.

The presence of bacteria commonly found in human feces, termed as coliform such as E. coli present mostly in surface water is a common indicator of faecal contamination.

"