Answer:1 2 4 3
Explanation: These all have to change shape before new rocks are created
Earth's atmosphere helps maintain a constant temperature.
Answer:
Some challenges animals might face when migrating are disease, global climate change, overexploitation, and habitat destruction.
Explanation:
In virtually every corner of the globe, migratory animals face a growing array of threats, including habitat destruction, overexploitation, disease, and global climate change. Saving the great migrations will be one of the most difficult conservation challenges of the 21st century.
Answer:
Reproduction.
Explanation:
Reproduction is the process by which organisms produce new organisms of the same type. This can be asexual (an organism not needing a mate to reproduce like certain plants or bacteria) or sexual reproduction (needing a mate to reproduce). Most species can only produce sexually.