¿Mediante qué órganos o sistemas nos relacionamos con el medio, recibimos estímulos y generamos respuestas?​

My question says on my assignment. read the following scenarios and decide which of the properties of life are being described. the first one is. katherine stopped on the way to school to grab some donuts. 2. because a dog cannot sweat, it has to pant in order to stay cool. 3. an elephant trun had no bone but 4,000 muscles. i have no idea what i am supposed to anwer. i can't find the answer in my notes or book that i can understand anyway

Blood has traveled from the heart to the toes. which describes the next step of the circulation process?

Is there any species that went extinct in recent years due to natural causes (not caused by human interaction). if so, what caused it?