Which is not a means by which protists move?
a.
flagella
c.
muscle contraction
b.
cilia
d.
pseudopods

The answer is;  C: muscle contraction

Muscle is only found in higher more complex organism called vertebrates. These muscles are used for movement. IN lower organisms such as bacteria and protists, they use flagella or cilia (which are appendages on the cells) to move. Other primitive organisms such as amoeba use pseudopodia (which are temporary and dynamic projections of the cell) for movement and endocytosis.    

a) the particles of the chair are strongly held together.