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Balance Affinity say that you get these spells when picking that talent: Starsurge, Starfire, Sunfire and Typhoon. Let's say you are in Feral specialization: when you select Balance Affinity as your chosen affinity talent, you get an extra button for Moonkin Form on your Stance bar. If you choose Guardian Affinity, your Guardian abilities will be buffed, etc. That is - if you chose Balance Affinity in row 30 and Heart of the Wild in row 35, your balance spells will be buffed.
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Whichever Affinity talent you chose will be buffed when you select Heart of the Wild. Your affinity talents are located in row 30: Balance Affinity, Guardian Affinity and Restoration Affinity. Heart of the Wild is a talent that buffs your chosen Affinity.
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