An article about half-lives describes a parent isotope. what is a parent isotope?

the isotope that forms from the radioactive decay of a less stable isotope

the isotope that forms from the radioactive decay of a more stable isotope

an isotope that undergoes radioactive decay to form a less stable isotope

an isotope that undergoes radioactive decay to form a more stable isotope

Correct option is D.

Explanation:

A parent isotope is the one which undergoes decay in order to form 2 or more stable daughter isotopes.

Here, the parent isotope is radioactive in nature and radioactive substances are unstable. So in order to gain stability, Parent isotope undergoes radioactive decay to form more number of stable daughter isotopes.

the leaf is an organ of a typical plant, and the main functions are to complete photosynthesis and allow the plant to exchange gas, just like how we have the respiratory system. leaves have the stomata, which collects maintains co2 and o2 levels. this is necessary for cell metabolism. the leaf also collects sunlight using chloroplasts. succinctly, leaves own a pivotal role in sustaining plant life.

answer; i do believe the correct answer is (river); /// good luck