To solve this problem, we need to identify the type of relationship mycorrhizae represent.$\newline$Let's analyze the options:$\newline \bullet$Option 1: Amensalism - This is a type of interaction where one organism is inhibited or destroyed while the other remains unaffected. Mycorrhizae do not fit this description.$\newline \bullet$Option 2: Antibiosis - This is an interaction where one organism produces substances that are harmful to another organism. Mycorrhizae do not fit this description.$\newline \bullet$Option 3: Mutualism - This is a symbiotic relationship where both organisms benefit from the interaction. Mycorrhizae are a classic example of mutualism, as they involve a symbiotic association between fungi and plant roots, where both parties benefit.$\newline \bullet$Option 4: Fungistasis - This refers to the inhibition of fungal growth. Mycorrhizae do not fit this description.$\newline$Therefore, the correct answer is Option 3: Mutualism.