1. When I'm worried about something, I follow my parents' advice.
2. When I'm worried about something, I obey my parents' advice.
3. When I'm worried about something, I take my parents' advice.
4. When I'm worried about something, I ____________ my parents' advice.
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Ae the sentences all grammatical? What other verbs are suitable for the blank in #4?
"follow" and "take" are the best verbs to use for this expresssion. So 1 and 3 are correct. 2 would be better if you simply omit the apostrophe and the word "advice."
Yes, all the sentences are grammatical. In sentence #4, there are a few suitable verbs that can be used in the blank to convey following or heeding parents' advice when worried about something:
1. "heed" - This verb means to pay attention to or take notice of someone's advice. For example, "When I'm worried about something, I heed my parents' advice."
2. "follow" - This verb means to act in accordance with or adhere to someone's advice. For example, "When I'm worried about something, I follow my parents' advice."
3. "listen to" - This verb phrase means to pay attention to and consider someone's advice. For example, "When I'm worried about something, I listen to my parents' advice."
4. "adhere to" - This verb phrase means to stick to or comply with someone's advice. For example, "When I'm worried about something, I adhere to my parents' advice."
These are just a few examples, but there may be other suitable verbs depending on the specific context or intention of the sentence.