The results of human activity on the natural environment are called _[blank]_ effects.

anthropogenic
anthropometric
anthropomorphic
anthropological

anthropogenic

Explanation:

The effect of human activity on the environment is called as anthropogenic.

Anthropogenic impacts can be on the ecosystems, biodiversity, and on natural resources. The human activities such as forests fires, deforestation, pollution are anthropogenic activities.

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.