Complex sentence: The material of both the block and bristles, filaments, is also chosen to withstand hazards of its application, such as corrosive chemicals, heat or abrasion, this gives rise to a range of possible choices including plastic, metal, wood or even animal hair.
Split into simpler sentences: The material of both the block and bristles or filaments is also chosen to withstand hazards of its application, such as corrosive chemicals, heat or abrasion. This gives rise to a range of possible choices, including plastic, metal, wood or even animal hair.