Final answer:
Faults are fractures in the Earth's crust where displacement has occurred, and they do not start cyclones. Earthquakes occur along these faults due to the built-up stress from tectonic plate movement being released suddenly.
Step-by-step explanation:
When discussing earthquakes and their relation to faults, it is essential to understand that faults are fractures in the Earth's crust along which displacement has occurred. They are the sites where the Earth's tectonic plates interact, and these interactions can cause earthquakes. Contrary to the incorrect statement, faults do not initiate cyclones; thus, the statement "It is where fault cyclone starts" is not true about faults. Faults can indeed be found on land (A) and under the ocean (C). They represent an opportunity, or space, where the Earth's crust has been broken and movement has occurred (D).
Looking at plate tectonics, this theory describes the large-scale motion of the Earth's lithosphere, contributing to various geological phenomena including earthquakes. The creeping motion of tectonic plates against each other builds up stresses that are eventually released as earthquakes. Faults are instrumental in this process, as the stress accumulation leads to sudden slippages along these faults when the stress exceeds the frictional forces holding the rocks together. These slippages or movements are what we experience as earthquakes. Moreover, earthquakes can provide evidence for resonance and wave interference which can have varying impacts on structures based on their frequency and amplitude in relation to the buildings' natural frequencies.