Final answer:
Amoeba have simpler homeostasis due to being unicellular, whereas humans are multicellular with complex systems such as the endocrine and nervous systems for homeostasis.
Step-by-step explanation:
C) Amoeba are unicellular and have simpler homeostasis.
Homeostasis refers to the ability of an organism to maintain internal stability, even when faced with external changes. Amoebas, being unicellular organisms, have a simpler set of homeostatic mechanisms compared to humans, who are multicellular and have much more complex systems. Amoebas rely on processes such as osmoregulation and simple feedback mechanisms to regulate their internal environment.
In contrast, humans have developed intricate organ systems for homeostasis, such as the endocrine and nervous systems, which allow for highly regulated control over internal conditions. These complex systems are necessary to manage the diverse functions and needs of the numerous cell types present in multicellular organisms like humans. Moreover, humans have both intrinsic and extrinsic regulatory mechanisms and use complex processes like hormonal regulation to maintain homeostasis.