Which layer of Earth has convection currents?

Asthenosphere
Crust
Lithosphere
Mesosphere

Which properties describe all matter?

If you are in a chronic state of anxiety but also suffer from moment of sudden, intense fear you are problably suffering. from

Some birds look for food near cattle and other livestock. the movement of the cattle churns up the ground, making insects available to the birds. the cattle appear to be unaffected by the presence of the birds. what kind of relationship exists between the birds and the cattle? o a. parasitism o b. commensalism o c. predation o d. mutualism