Which sentence uses an action verb?
a. the children visited the science museum.
b. the monkey exhibit was empty.
c. the animals were tired from the heat.
d. did you have lunch at the zoo?

b. they require a huge investment of time, dedication ,training, and patience almost from the day they are born.

explanation:

the sentence gives a clear evidence of how carefully the sar dogs are selected and also specify from what time this exercise begins."almost from the day they are are born." this sentence shows as that this exercise begins early.

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this is hard!