The reason lunar and solar eclipses do not happen every month is primarily due to the tilt of the Moon's orbit relative to the Earth's orbit around the Sun.
The Moon's orbit is inclined at about 5 degrees to the plane of the Earth's orbit (the ecliptic). This means that during most new moons and full moons, the Moon is either above or below the Earth-Sun line, and therefore, it does not cast a shadow on the Earth (during a new moon) or does not fall into the Earth's shadow (during a full moon).
Eclipses can only occur when the Sun, Earth, and Moon align closely enough to cause a shadow to be cast or for the Earth to block the Sun's light from reaching the Moon. This alignment only occurs at specific points, called eclipse seasons, which happen roughly every six months when the Moon crosses the ecliptic plane.
So, the correct reason related to your choices is:
The tilt of the Moon’s axis does not allow for monthly alignment.
Specifically, it is the tilt of the Moon's orbit (not its axis) that prevents monthly eclipses from occurring.