Lion is related to Prowl in the same way as Bear is related to

Leaf is related to sap in the same way bone is related to.......

Boat is related to Oar in the same way as Bicycle is related to.........?

Choose the correct alternative for the given relation.

Proteins : Growth : : Carbohydrates : ?

Choose the correct alternative for the given relation.

Ampere : Current

Infestation is to Food as Infection is to.......?