What occurs during a decomposition reaction?

new compounds are formed by chemical bonding
the components of several molecules recombine to form new molecules.
a compound partitions into its components.

Explanation:

Correct answer is:

The components of several molecules recombine to form new molecules.

the level of progesterone is low at the pre-ovulatory phase of the cycle but it gradually increases and the levels are high at the luteal phase. if pregnancy occurs, the level of progesterone will be high throughout the pregnancy.

if egg is fertilized and the mother gets pregnant, progesterone starts preparing the uterus for the implantation. it starts building up the lining of uterus and make it hostile of the period of pregnancy.

the three components of a nucleotide are the nitrogenous base, the phosphate group and the five-carbon sugar.