Answer:
Gerund
Step-by-step explanation:
A gerund is a type of verbal that do not act as a verb in a sentence but as a noun. This verbal is formed with the root of a verb + ing (or the present participle form of a verb).
For example, Jog + ing = Jogging (An extra g is added because the word jog ends with a vowel and a consonant).
In the sentence, jogging is a gerund because it functions as a noun (it refers to the practice of an exercise); furthermore, it is also the subject of the sentence as for it is what is being dealt with.