Horizontal stems below the ground are called? rhizomes spines runners roots

The underground stem is Rhizomes

Spine is stem modificatiom but above the ground.
Runners are stem like in grass
roots are roots not stem !!

so go with A !!

Tamarind can be grown on homesteads, plantations, and wasteland or as a forest tree. methods of propagating tamarind there are two methods of propagating tamarind trees: seed propagation and vegetative propagation. seed propagation: it involves the collection, preparation and direct planting of the seed.answer from google full credit to google.