Answer:
Iron deficiency leads to low hemoglobin levels, and therefore oxygen levels are lower than normal
Step-by-step explanation:
Hemoglobin is a protein found in red blood cells whose main function is to transport oxygen to the tissues. Anemia is a condition caused by iron deficiency, which is a micronutrient required for red cells to produce hemoglobin. When hemoglobin levels in red blood cells are low due to iron deficiency (anemia), then levels of oxygen in the blood are also lower than normal. In consequence, iron deficiency may cause that cellular tissues don't have sufficient oxygen to carry out their functions.