Final answer:
The effect of the First Aid Kit Tier 1 on healing and shielding is most likely an increase, as is common with such items in games. However, without specific details on the game in question, an accurate answer cannot be provided.
Step-by-step explanation:
The First Aid Kit Tier 1 in a game is typically a power-up or boost that provides some kind of benefit to the player's units. In most gaming contexts, a First Aid Kit of any tier would be expected to positively increase the healing or shielding capabilities of the units it is applied to. If we assume that the First Aid Kit Tier 1 functions similarly to how such items typically function in games, then the correct answer would likely be that healing and shielding received by units is increased. However, without more context or explicit information about the specific game mechanics, it's impossible to provide an accurate answer to the impact of the First Aid Kit Tier 1.
Each game has its own mechanics, and an item like a First Aid Kit could have different effects based on the game's design. Without knowing the specific game the student is referring to, we cannot state with certainty whether the First Aid Kit increases, decreases, or has no effect on the healing and shielding received by units. The student is encouraged to refer to the game's manual or official tutorials for detailed information on the item's effects.