Explain how the isotopes of an element differ.
they each have a different number of electrons in their outermost energy level.
they each have a different number of protons in their nuclei.
they each have a different number of neutrons in their nuclei.
they each have a different charge.

Option C, They each have a different number of neutrons in their nuclei.

Explanation:

Isotopes of an element have different number of neutron but they have same number of proton.

For example -

There are two isotopes of carbon i.e carbon-12 and carbon-14

The number of protons in both carbon-12 and carbon-14 is equal to 6

while the number of neutron in carbon-12 is 6 while the number of neutron in carbon-14 is 8

Hence, option C is correct

i think its control and coordinate because im pretty sure thats what tissue does and the joints are what control movement and then your skeletal/ bones provides portection. hope that .

1)

i))the process of preparing food by green plants in the presence of sunlight is called photosynthesis.

ii) leaf is the site for photosynthesis.

iii) it takes place as,

6h2o+6co2=c6h12o6+602