Answer:
a. Faraday cage
Explanation:
Faraday cage -
It refer to as a shield which helps to block any electromagnetic fields , is referred to as faraday cage .
It is also known as Faraday shield .
In a Faraday cage , a mesh or covering conductive material is added to block any electromagnetic field .
Hence , from the given information of the question ,
The correct answer is a. Faraday cage .
