<span>The question says, ........... is the ability of an organism to change internally or externally in relation to its environment. The correct option is homeostasis. Homeostasis is the ability of an organism to maintain its internal body system within the normal range when dealing with external changes.For instance, the human body can regulate its internal temperature by shivering or sweating depending on the prevailing weather condition.</span><span />
The respiratory system of the birds
D)crossing over of homologous chromosomes during meiosis.
The respiratory system affects the cardiovascular system by providing the oxygen needed by the respiratory system for provision of energy and also helps get rid of the carbon dioxide produced as a by-product by transporting it to the lungs