Answer:
mountain chains, earthquakes, volcanoes.
Hello po! Kailangan po ata isend nyo po yung babasahin para sagutan iyan. Pwede nyo po irepost itong tanong ulit.
Answer:
Mutations, gene flow, and sexual reproduction are all major causes of variation. By altering the genes of individuals in a population, DNA mutation causes genetic variation. As new individuals with different gene combinations migrate into a population, they cause genetic variation.
Explanation:
B)
