At 16, juana is at an appropriate weight and likes to eat whatever she wants to. what's the best strategy to ensure juana's health? a. start paying attention to her diet so she won't gain weight later and walk once a day b. get in the habit of eating food high in nutrients and engage in regular physical activity c. reduce her calorie intake to 1,800 per day and take up an aerobic sport like soccer

B

Let me know if I'm correct

I'm pretty sure it's B

answer: the correct answer is 1.

explanation: there are various process in which a radioactive nuclei decays:

1) alpha decay: in this process, a heavier nuclei decays into lighter nuclei by releasing alpha particle. the mass number is reduced by 4 units.

2) electron capture: in this decay process, a parent nuclei absorbs an electron and gets converted into a neutron. simply, a proton and an electron combines together to form a neutron. mass number does not change in this process.

3) gamma ray emission: it is a decay process in which an unstable nuclei gives excess energy by a spontaneous electromagnetic process. this decay releases . this process does not change the mass number.

4) positron emission: it is a type of decay process, in which a proton gets converted to neutron and an electron neutrino. this is also known as -decay. in this the mass number remains same.

from the above information, we see that only alpha-decay is producing a change in the mass number of the nucleus.

i think they are all correct

explanation:

they seem good