Starfish, flatworms, and sponges may be cut into pieces, and the individual parts will grow new individual animals by means of the process of
fragmentation
budding
meiosis
propagation

The right option is; fragmentation

Starfish, flatworms, and sponges may be cut into pieces, and the individual parts will grow new individual animals by means of the process of fragmentation.

Fragmentation is a type of asexual reproduction where an organism is divided into fragments, and each of the fragments then grows and develops into new, matured, fully grown organisms that are genetically identical to their parents. Fragmentation usually occurs in many organisms such as molds, many plants, and animals such as sea stars, and sponges.

your answer should be c) enjoy!