Atentative explanation to a question about the natural world is a

law.

theory.

hypothesis.

fact.

when atoms of different types of elements join together, they make molecules called compounds. water consists of compound molecules made up of 2 hydrogen atoms and 1 oxygen atom. this is why it's called h2o. water will always have 2 times the number of hydrogen atoms as oxygen atoms.

hope it mark me as brainlieast.

your body is trying to warm itself up. or more precisely, sensors in your skin send messages to your brain to generate heat to your body.

he forelimbs below belong to four species that descended in a direct line from the ancestral mammal shown above. of the four descendants shown, which species most likely appeared earliest in evolutionary history?