Name the association in which one species produces poisonous substance or a  change in environmental conditions that is harmful to another species.

 Explain sexual deceit.

Which of the following statements regarding species interdependence are true?

$I.$ An Association of two species where one is benefitted and other remains unaffected is called mutualism.

$II.$ An interspecific association where both partners derive benefit from each other is called commensalism.

$III.$ A direct food relation between two species of animals in which one animal kills and feeds on another is referred as predation.

$IV.$ A relationship between two species of organisms where both are partners are

benefitted from each other is called symbiosis

Select the statement which explains best parasitism.