Which term refers to a mutualistic symbiosis where fungal hyphae penetrate plant root cells?

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Arbuscular mycorrhiza refers to a mutualistic association between fungi and plant roots, where the fungal hyphae penetrate the root cells and form specialized structures called arbuscules, which enhance nutrient exchange between the partners. Ectomycorrhiza, on the other hand, involve fungal hyphae that surround but do not penetrate the root cells, while lichens are symbiotic associations between fungi and photosynthetic organisms such as algae or cyanobacteria. A haustorium is a specialized organ in parasitic plants that enables them to extract nutrients from their host.

Which Term Refers to a Mutualistic Symbiosis Where Fungal Hyphae