Given what we know about embryological development, we can confirm that the option that is matched correctly with its trimester is the first trimester—tissues and organs form; amniotic sac forms; neurulation occurs.
The first trimester is one of the busiest for a fetus. During this trimester:
- Tissues and Organs form or begin to form
- Amniotic sac forms
- Neurulation occurs
and so much more that is not mentioned in the question.
The formation of the amniotic sac is the earliest of the major events listed. This sac serves as the aquatic medium in which the fetus will find itself during the next 9 months.
Neurulation is the name given to a very complex set of processes that lead to the creation of the neural tube and then the brain. Then, finally, the tissues and organs finish forming into their embryonic stages.
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