The phrase "and the interrelationship" is correct and usable in written English.
It can be used when discussing connections or relationships between two or more entities, concepts, or variables.
Example: "The study focuses on the impact of climate change on biodiversity and the interrelationship between species survival and habitat loss."
Alternatives: "and the relationship" or "and the connection".
Its legitimacy rests on its position as protector of the two holy places of Mecca and Medina and the interrelationship of the royal family with the ranking religious leaders.
"For each piece I want to create the material and the interrelationship of the intervals anew," the prominent Swiss-Austrian composer Beat Furrer has said about his life's work.
A quite different work, L'Oeuvre (1886), explores the milieu of the art world and the interrelationship of the arts by means of the friendship between an Impressionist painter, Claude Lantier, and a naturalist novelist, Pierre Sandoz.
During the Occupation, Jean-Paul Sartre had continued to explore the questions of freedom and necessity, and the interrelationship of individual and collective responsibility and action, in plays such as Les Mouches (1943; The Flies) and Huis-Clos (1944; No Exit, also published as In Camera) and in the treatise L'Être et le néant (1943; Being and Nothingness).
Common themes were identified and the interrelationship of theme clusters was explored.
Cluster analysis (CA) and principal component analysis (PCA) were employed to evaluate the water quality and the interrelationship between variables.
"What has changed is the attack of Sept. 11 and the loss of the system and the interrelationships it did have," said Mr. Ward, adding that the agency and New York transit officials were working well together.
There are still a few temperate forests that have been disturbed little by human activities, and the interrelationships between the vegetation and the large animals are of interest.
