Which characteristic of enzymes allows it to be highly specific in the reactions they catalyze?
its structure
its concentration
its diluted form
its ability to replicate

muscle endurance

explanation:

i can do 50 in a row ( but i get so tired after that)

the answer is the first electromagnet (a). this is because it has more coils around the ferromagnetic material. increasing the number of coils increases the surface area in which the metal interacts with the current in the coil. this enables more atoms in the metal to become aligned hence becoming more magnetized.