Answer:
A)different types of animals and plants, and the forest soil
Step-by-step explanation:
Ecosystem is sum total of biotic and abiotic factors of an area. All the living beings together make the biotic component of ecosystem while the abiotic components include physical and chemical factors such as temperature, soil type, rainfall pattern, light intensity etc. Hence, different types of animals and plants (biotic components) and the forest soil (abiotic component) would describe the forest ecosystem.