If the temperature is increased the particles gain more kinetic energy or vibrate faster. This means that they move faster and take more space.
I just solved similar type of question. You can refer to my solution which I have attached
A testing instrument that's used to measure electrical signals
in a circuit and display them as waveforms on a screen is called
an oscilloscope.
Answer:
I think the answer is
C) iron nails are attracted towards all materials