An ameba is a single-celled organism. it uses its cell membrane to obtain food from its environment, digests the food with the of organelles called lysosomes, and uses other organelles to process the digested food. from this, we can best infer that

(1) all single-celled organisms have lysosomes to digest food
(2) amebas are capable of digesting any type of food molecule
(3) single-celled organisms are as complex as multicellular organisms
(4) structures in amebas have functions similar to organs in multicellular organisms