Option 1 states that women were the main workers in the silk, lace-making, and knitting industries. This is correct as during the industrial revolution, women were indeed commonly employed in these industries due to their skillset and availability of labor.

Option 2 states that factory managers were well aware of the health risks of industrial work on children. This statement is not mentioned in the question and there is no information provided to confirm or deny it. Therefore, we cannot determine if this statement is correct or not based on the given information.

Option 3 states that children were often employed in textile factories. This is correct as child labor was a common practice during the industrial revolution, particularly in textile factories. Children were often employed due to their small stature and ability to perform certain tasks.

Option 4 states that the novel `Hard Times` by Charles Dickens was a severe critique of the horrors of industrialization. This is correct as `Hard Times` does indeed depict the negative effects of industrialization and criticizes the harsh conditions faced by the working class during that time.

Therefore, the correct answer is option 3, as statements 1, 3, and 4 are all correct based on the information provided.