What is one way of describing elements? a: they are the building blocks of matter. b: they are the most expensive materials on earth. c: they break down easily d: they are the smallest particles of any material. i'll give brainliest to anyone who gives the right answer.

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

The chemical form of energy that is useable by the cell to do work

Which statement describes characteristics of planarians? a they live in oceans, are parasites, and reproduce only sexually. b they live in fresh water, are parasites, and reproduce only asexually. c they live in oceans, are free living, and reproduce sexually and asexually. d they live in fresh water, are free living, and reproduce sexually and asexually.