They construct dams and create an ecosystem for other species . Because of their dam building nests become available for birds, fish population increases and waterfowl population goes up
Cytokinesis<span> is that part of the </span>cell<span> division process </span>during<span> which the </span>cytoplasm<span> of a single eukaryotic </span>cell divides<span> into two daughter </span>cells<span>.</span>
The ER synthesizes most substances of the cell, and then the Golgi body ins the one to classify, distribute, and modify them.
The proteins forming the cytoskeleton are the ones that hold everything in place.
The main proteins doing this are the microtubules, microfilaments, and Intermediate filaments.
Also, mention the carrier proteins, that move substances inside the cell.
The answer is A because it is the most explainable answer.