The major structural elements of the cytoskeleton are:. A) The major structural elements of the cytoskeleton are proteoglycans and cellulose microfibrils.
B) microtubules, microfilaments, and intermediate filaments.
C) the extracellular matrix and the cell wall. cleavage furrows and G-actin.
D) the cytoplasm and cytosol.

B. microtubules, microfilaments, and intermediate filaments.

Explanation:

the cytoskeleton helps a cell maintain its shape that's why it is made up of interlocking microtubules, microfilaments, and intermediate filaments.

1. efficient use of space

2. elimination of groundwater contamination

3. energy generation

4. lower carbon footprint