Volcanic and Tectonic forces are responsible for shaping the Earth's surface and causing various geological phenomena.

1. Volcanic forces:
Volcanic forces originate from within the Earth and are associated with volcanic activity. They are primarily responsible for the formation of volcanoes, volcanic eruptions, and the release of magma, gases, and volcanic ash onto the Earth's surface. These forces are driven by the movement of molten rock, known as magma, from the Earth's mantle towards the surface through volcanic vents or fissures. Volcanoes can be found in different forms such as shield volcanoes, stratovolcanoes, and cinder cones.

2. Tectonic forces:
Tectonic forces, also known as plate tectonics, are driven by the movement and interactions of large rigid plates that make up the Earth's lithosphere. These forces originate from within the Earth and are responsible for various geological phenomena such as earthquakes, mountain formation, and the creation of major features like oceanic trenches and rift valleys. Tectonic forces occur due to the movement of these plates in three main ways:

- Divergent boundaries: Plates move away from each other, creating rift zones and mid-oceanic ridges. This process leads to the formation of new crust as magma rises to fill the gap between the separating plates.
- Convergent boundaries: Plates collide with each other, resulting in subduction zones, where one plate is forced beneath another. This process leads to the formation of mountain ranges, volcanic arcs, and deep-sea trenches.
- Transform boundaries: Plates slide past each other horizontally, creating faults and causing earthquakes.

3. Gradational forces:
Gradational forces, also known as external forces, originate from outside the Earth and are primarily responsible for the erosion, weathering, and deposition of materials on the Earth's surface. These forces include processes such as wind, water (rivers, waves, glaciers), and ice, which gradually wear down and reshape the landforms. Gradational forces can create various landforms such as valleys, canyons, deltas, and coastal features.

In conclusion, while volcanic forces originate from within the Earth and are associated with volcanic activity, tectonic forces result from the movement and interactions of large rigid plates. Gradational forces, on the other hand, originate from outside the Earth and are responsible for the erosion and deposition of materials on the Earth's surface. Therefore, the correct answer is option B: Tectonic and Gradational forces originate from within and outside the Earth, respectively.