Ill give u brainliest asap

which of the following measurements is used to compare the distance between objects in the solar system?

select one:
a. distance between earth and saturn
b. distance between the sun and earth
c. speed of rotation of saturn
d. speed of rotation of earth

I think its A. it cant be C or D b/c we are measuring the distance between Earth and Saturn, not the speed.

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water pollution kills aquatic life. aquatic life includes algae and other plant life that use photosynthesis. photosynthesis takes   c02 out of the air.  

c02is a greenhouse gas.

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.