Cannabis compounds

Can somebody explain briefly what impact does the following indicators have on a cannabis bud/plant when smoking?

Sativa
Indica
THC
CBD
CBG
CBC
CBN
Terpenes

Wanted to buy some sativa dominant seeds but it says it does not have psychoactive effects but a high concentration of CBD. What does that means? Who is in charge with the high/uplifting effect though?

Imagine i did searched these on Google but for example it says that Indica contains more CBD and stimulates apetite and your picture is saying that THC is stimulating apetite. So who is right?

Terpenes like limonene, pinene gives an uplifting feeling for energy. THC will stimulate appetite. CBD occurs within cannabis naturally. Or if to strong of feeling the psychoactive effects try CBD strain with THC 50/50 ratio. Indica used mostly for sleep,later in day use can make you tired or sativa if needed for energy before walk or doing things and helps with pain also. There is still research what each terpenes does specifically but generally rule.