Answer: A Microtubules
Explanation: The cytoskeleton is composed of at last three different types of fibers: microtubules, microfilaments, and intermediate filaments. These fibers are distinguished by their size with microtubules being the thickest and microfilaments being the thinnest.
Im pretty sure its
A. Number of Organisms
B. Amount of Matter
A million sorrys if im wrong :(
D. Myosin and actin do not fully detach, so the muscle cannot relax.
1. Sustainable 2. Environmental
Hydrogen, oxygen, and nitrogen atoms.