Answer:
They are all forms of agriculture.
Step-by-step explanation:
To briefly define agriculture, it is the cultivation of plants and/or animals.
Fishing happens to be a form of agriculture (animal cultivation), namely "Aquaculture."
Farming is a form of agriculture (plant & animal cultivation).
Hunting (Hunting & Gathering) is a form of agriculture (animal cultivation), and is widely recognized as the first form of agriculture in human history.
Ranching is a form of agriculture (animal cultivation), typically referred to as "Livestock Ranching."
Gardening is a form of agriculture (plant cultivation), typically referred to as "Horticulture".