What the mission of the Kepler space observatory?
A) collect and bring back soil samples from Mars
B) discover new planets like earth in the Milky Way
C) take photographs of the planets in our solar system
D) develop new tools for Mars exploration

blood enters the heart through two large veins, the inferior and superior vena cava, emptying oxygen-poor blood from the body into the right atrium of the heart. as the ventricle contracts, blood leaves the heart through the pulmonic valve, into the pulmonary artery and to the lungs where it is oxygenated.

the sun creates it's own light, also gives light and life to bunch of stuff like plants,animals,humans etc.photosyntesis is the process of making food which needs sun,water,nutrients etc.