Which is an example of primary succession?

An oak growing in abandoned field

Ferns growing in the forest

A new cactus growing next to an old cactus

Lichens growing on a cooled level rock

An oak growing in an abandoned field.

Explanation:

This is the correct answer because primary succession is when plants and animals are the first to colonize in a lifeless habitat, and an abandoned field is a lifeless habitat since its been abandoned.

explanation:

the universal gravitation equation. since the gravitational force is directly proportional to the mass of both interacting objects, more massive objects will attract each other with a greater gravitational force. if the mass of one of the objects is doubled, then the force of gravity between them is doubled.

multiplying and dividing the two decimals and the eqations by the same number of the overalls