The embryo with 8 to 16 blastomeres is called :

Morula

The correct answer is Option (1): Morula

The mitotic division starts as the zygote moves through the isthmus of the oviduct called cleavage towards the uterus and forms 2, 4, 8, 16 daughter cells called blastomeres.

The embryo with 8 to 16 blastomeres is called a morula .

The morula continues to divide and transforms into blastocyst  as it moves further into the uterus.

The blastomeres in the blastocyst are arranged into an outer layer called trophoblast and an inner group of cells attached to trophoblast called the inner cell mass.