Pl hel its due today but i don't get it plsss help ill give brainlies Which of the following could be a characteristic of the fossil that is most closely related to humans?

S-shaped back bone
Arms longer than legs
Water-dwelling
Tree-dwelling

organisms are more likely to be more preserved in mud than sand because mud is moist and wet, while sand is very dry.

explanation:

let the different atoms be x and y. each with four protons and same mass will be represented as follows.

mass number is number of protons + number of neutrons.

            and  

since, it is given that one has a negative charge while the other is neutral. therefore, there will be increase in number of protons and the atom will be represented as follows.

according to periodic table, mass number of beryllium is 9 and it has atomic number 4 so, the atoms will be and .  

the protons and neutrons will be located inside the nucleus whereas the electrons will be revolving around the nucleus.  

wher is the rest of the question