3D printing, also known as additive manufacturing, is a process of making three dimensional solid objects from a digital file. It is used in a wide range of industries and has various applications.

It can be used to create intricate and customized shapes in confectionery items like chocolates, candies, and other desserts.

It has been used to create customized bionic ears for people with hearing impairments.

It is used in the automotive industry for rapid prototyping, manufacturing of customized parts, and even some production of vehicle components.

It is used in reconstructive surgeries to create patient-specific implants, prosthetics, and surgical guides.

It can be used to create specialized components and parts for data processing technologies, such as computer hardware.

Therefore, all the five statements are correct.