(Originais Teachy 2023) - Question Medium of Spanish

During a study trip to the Amazon, a group of biology students had the opportunity to observe the rich biodiversity of the region. While exploring the forest, they paid attention to the different habitats and noticed the variety of plants and animals that were essential for the local ecological balance. When documenting their findings, the students were challenged to describe in Spanish the importance of certain species to the environment, using appropriate vocabulary for animals, plants, and parts of the human body. One of the students wrote about the importance of trees for carbon capture and oxygen production, comparing them to 'los pulmones del planeta'. Based on this context and considering the interdisciplinary nature between biology and the Spanish language, what Spanish term could the student use to refer to 'the root of a tree that absorbs nutrients from the soil' and that would be suitable to maintain the cohesion and terminological precision of their scientific text?