Participles are words that are formed from verbs but act as adjectives. They are called <em>verbals</em>. What is more, phrases are a group of words without a subject and a verb that function as as single part of speech. Therefore, participles consist of the participle and its complements and modifiers.
Taking all this into account, it can be said that the participial phrase is "trimmed that morning" and that it modifies the noun "grass". This is a past participle which is further specified by the NP "that morning" which gives information about the time in which the grass was trimmed.
What the lesson number the lesson name and subject the class and the unit
Happiness. If you live longer but have a worse life it’s not worth it. If you live shorter but have a better life it’s the better option
so what Iducky22 is pretty much saying is d would be the answer for e2020