he is referring to the upsurge of interest in mobile television, a nascent industry at the intersection of telecoms and media whic offers new opportunities to device-makers, content producers and mobile-network operators.

请问此句中红色which定语从句修饰的是谁？如果不从意思上来说的话，如何判别which定语的修饰对象，比如说"a desk in the room which is red is made of wood“中，which is red修饰的是谁？是desk 还是room?

请高手不吝赐教！