Which sentence contains a gerund? my cell phone battery is dying. stop worrying about every detail. was gigi holding the crying baby? hiking is a great form of exercise.

Hiking is a great FORM of exercise so option 4.

Hiking is a great form of exercise.

Explanation:

A gerund is a verb that ends with –ing and also functions as a noun. It is a word that is formed with verbs but act as nouns. It acts as subject or object of a verb, or can sometimes take a plural ending.

Gerund can look exactly the same as a present participle of a word, but describes something else.

Hiking is a great form of exercise. In this sentence, hiking is the gerund because it acts like a noun.

the choice that is not a technique that you should use to come up with ideas for the topic of a research project is, writing about academic subjects that are not interesting to you. this does not belong to the techniques to come up with ideas because having no interest in a certain topic will lose your drive to come up with better ideas. it gives no room for improvement and acquiring of new ideas and information. 

explanation: