How do primitive heterotrophs produce energy? a. aerobic respiration b. chemical fermentation c. photosynthesis

littering streams           is the answer

✿   this landform has a high elevation and a high relief

✿   this landform is a mountain

i believe the answer would be b. hope it : )

igneous rocks which formed by the crystallization of magma at the surface of the earth called extrusive rocks. they are characterized by fine-grained textures because the rapid cooling at or near the surface did not provide enough time for large crystals to grow.