as the title reads, can you respond to someone tapping a land? No, mana abilities (abilities that generate mana) don’t use the stack. if the land is tapped by any other reason that not generating mana than it may be respondable.

Can a creature fight if it is tapped?

Tapped creatures cannot attack (even if they have vigilance) but they can still fight. Similarly, note that if the creature was untapped, fighting does not cause it to tap (unless the fight spell or ability says so).

Can a creature be tapped to prevent its activated ability?

Only after you are done activating your creature’s ability does your opponent has a chance to play his tapping ability, but by that point your creature is already tapped, and tapping it won’t have any effect. If you do not have priority, then your opponent may choose to activate his tapping ability to tap your creature.

What happens if you tap a creature in RuneScape?

If the tap or untap symbol is in the activation cost, the creature must have been under your control since the start of your turn (must not have summoning sickness). You must be able to pay the cost. (e.g. The creature cannot already be tapped if the ability has the tap symbol in its cost.)

Can a creature be activated as a sorcery?

Equip, Loyalty abilities and any other ability that specifically mention they can only be activated “as a sorcery” cannot be activated in response to another spell or ability. If the tap or untap symbol is in the activation cost, the creature must have been under your control since the start of your turn (must not have summoning sickness).

What happens when your opponent casts an instant to destroy a creature?

I was wondering if my opponent casts an instant to destroy target creature, during his or her turn, if I could respond by tapping a creature (perhaps the targeted creature if its untapped) to regenerate my creature before the spell is resolved? Yes, you can tap activate the abilities of a permanent in response to an instant.