What was formed when the biological material became trapped in a molecular bubble

Protobionts  of course! I hope this answered your question :))

Protobionts was formed when the biological material became trapped in a molecular bubble.

the answer is d. chordata

primary succession occurs in essentially lifeless areas regions in which the soil is incapable of sustaining life as a result of such factors as lava flows, newly formed sand dunes, or rocks left from a retreating glacier. secondary succession occurs