It should be transport of waste but I’m not 100% sure :(
Rainwater picks up carbon dioxide from the air and as it percolates through the soil, which turns into a weak acid. This slowly dissolves out the limestone along the joints, bedding planes and fractures, some of which become enlarged enough to form caves.
Based on the characteristics you describe, this is most likely a type of fungi.
At the end of the result concludes RNA (Copied exact genes off of DNA)
