Final answer:
Anemia due to the lack of iron and chronic blood loss are classified as microcytic, hypochromic, (option A) as they feature small, pale red blood cells with reduced hemoglobin content.
Step-by-step explanation:
Anemia caused by a lack of iron and chronic blood loss is typically classified as microcytic, hypochromic. This classification originates from the morphological approach which examines the red blood cells (RBCs) themselves. Specifically, microcytic anemia features smaller than normal red blood cells, and hypochromic indicates a reduced concentration of hemoglobin within the cells, leading to a paler appearance. Iron deficiency is the most common type of anemia, often occurring from inadequate iron intake or chronic bleeding, which can result in diminished RBC production or iron availability necessary for hemoglobin.