Locomotive structures found in some protists include:
A. muscles.
B. flagella.
C. tentacles.
D. contractile vacuoles.
Flagella are whip like tails found in Euglena, single celled protists. Muscles and tentacles are multicelllular and so could not be found in protists, who are single celled. Contractile vacuoles are organelles found in some cells to regulate water balance and are not involved in locomotion.