Question

17. Stalactites is a --
O Sky pillar
O Natural formed cave
O Bottom pillar
Required​

Answer 1

BOTTOM PILLAR......IS YOUR ANSWER

Answer 2

A stalactite (UK: /ˈstæləktaɪt/, US: /stəˈlæktaɪt/; from the Greek stalasso, (σταλάσσω), "to drip", and meaning "that which drips") is a mineral formation that hangs from the ceiling of caves, hot springs, or man-made structures such as bridges and mines. Any material that is soluble and that can be deposited as a colloid, or is in suspension, or is capable of being melted, may form a stalactite. Stalactites may be composed of lava, minerals, mud, peat, pitch, sand, sinter, and amberat (crystallized urine of pack rats).[1][2] A stalactite is not necessarily a speleothem, though speleothems are the most common form of stalactite because of the abundance of limestone caves.[1][3]

is this the answer

if it is hope it helps