What is this? Please have an explanation for your answer

C) Breaking down inorganic compounds

Producers are plants, they break inorganic compound such as carbon dioxide, water etc and get their food .some plants lack Chlorophyll hence they are not able to do Photosynthesis and can not make their own food. they are either depend on other green plants or use other mode of nutrition like parasitic .

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.