1. The bronchi and alveoli organs are part of which organ system? (1 Point)
O Digestive System
O Excretory System
O Respiratory System
O Circulatory System
O Lymphatic System
Can you plz help?

Ithink that its like 15 mph.

If you get a map and put the countries a states all together it forms all one piece you can also tell because of the earth quakes

Mars and earth have quite a few things in common. both are  terrestrial planets, both are located within the sun’s  habitable zone, both have  polar ice caps, similarly  tilted axes, and similar  variations in temperature. and according to some of the latest scientific data obtained by rovers and atmospheric probes, it is now known that mars once had a  dense atmosphere  and was covered with  warm, flowing water.