Animal life changed greatly during the Cambrian explosion, with some groups expanding in diversity and others declining. What are the current hypotheses that explain these trends? A. Global climate changes.
B. Atmospheric changes.
C. Predator prey relationships.
D. Appearance of the marine top predator.
E. Changes in the regulations of develop.
F. Radiation of numerous terrestrial groups.

Options A,B,C, and F

A. Global climate changes.

B. Atmospheric changes.

C. Predator-prey relationships.

F. Radiation of numerous terrestrial groups.

Explanation:

Due to increasing natural disasters (such as volcanic eruption) and arthropological activities (such as mining) that led to the emission of harmful gases, changes in the atmosphere and overall climatic conditions is established.

They saturate the atmosphere and due to limited carbon sinks to absorb them, they alter the climatic parameters like temperature, rainfall, and relative humidity.

The effects of change in climatic parameters are flooding, habitat destruction, increased predation, and among others. Thus, leading to dispersal of some animal species and decline of many others.

Predator-prey relationship also plays an important role in the expansion (likely through migrating from danger) and in most cases decline of some animal species, especially when there's limited prey species to go round for the predators.

the answer for apex is "1 and 6"

the question isn't complete here so i can't right an answer '_'