Some life forms move so slowly that their movement can not be detected by normal observation the best way to determine any movement is by placing a mark at some point, and observing any change in position from it. why is this true

Atoms seldom exist as independent particles in nature a) as single particles, most atoms have low potential energy b) their electronegativity is much lower when they combine with other atoms c) atoms are more stable when they combine with other atoms d) neutral particles are rare