1) oxygen. 2) bone size 3) inner core, outer core 4) 10
<h3>The blood in the pulmonary artery is going to the heart to collect oxygen, and therefore has a low content of oxygen. So, the blood in the pulmonary artery is a violet colour because it has low oxygen. The blood in the pulmonary vein is oxygen rich, and so it gives a scarlet</h3>

Answer:
D
Explanation:
Sustainable agricultural practices are intended to protect the environment, expand the Earth's natural resource base, and maintain and improve soil fertility. ... Promote environmental stewardship. Enhance quality of life for farm families and communities. Increase production for human food and fiber needs.
Eat healthy foods salads and good stuff for their heart and no drugs so their heart is healthy and excersice for them to get in shape and health and healthy