Explanation:

Batholiths  are the lowermost or innermost intrusive igneous rock formations. They are characterized by their saucer or lens-like shape and usually occur at great depths below the Earth's surface.

Batholiths, laccoliths, and phacoliths are also intrusive igneous rock formations, but they are not typically the lowermost or innermost.

1. Lopolith are large masses of rock that can extend over a very large area but may or may not be the deepest.
2. Laccoliths are mushroom-shaped intrusions that occur closer to the Earth's surface.
3. Phacoliths are wavy intrusions associated with folded strata and also are not typically the deepest.