By carving symbols into walls of pyramids and/or caves
I'm not an expert on this but I'm speculating "fracking"
Which uses high water pressure to extract the coal.
Charlotte's response was an antithesis.
Antithesis is a statement which is a direct opposite of what was stated before. So, Dr. Barnes told Charlotte that she should follow her dreams and do something she loves. However, she retorts saying something quite different from his statement - telling him that what she loves won't really give her money to live from.
Answer: Amicus curiae
Explanation: Amicus curiae is the person who provides case related information, guidance,expertise,interest in that field etc to the court which can help and impact the case in influential manner.
Amicus curiae is not the person that belongs or is part of case rather provides information as external factor working for the court.He/she is also remarked as "friend of the court"