Question

The relation between the living organisms as well as the relation between the organisms and their surroundings form an

Answer 1

Answer:

Living organism and their relationship form an ecosystem: It's reason is in the definition of ecosystem which says that ecosystem is the interaction of living organism with their surrounding ( both abiotic and biotic )

Answer 2

$\textsf{The relation between the living organisms as well as the relation}\\\textsf{between the organisms and their surroundings form an \textbf{ecosystem}.}$