The levels of carbon dioxide are expected to of our oceans.
a. decrease and lower the ph
b. increase but not alter the ph
c. increase and lower the ph
d. increase and raise the ph

c. increase and lower the pH

Explanation:

The amount of CO2 that is in the atmosphere and that the seas absorb has increased due to human activity, this amount that the seas absorb naturally, is decomposing the balance causing the pH of the water to fall, that is to say acidification. The pH value is 8.2 with a variation of 0.3 units between the oceans.

The reaction goes like this: if the system absorbs more CO2, more hydrogen ion (H +) is produced on the other side of the reaction, which in turn reacts with the carbonate ion (CO3) 2-, which comes from calcium carbonate (CaCO3 ) of the shells of many animals, the reaction produces an imbalance in the calcification of these shells, the hydrogen ion prevents shellfish from using it to build their shells.

Reaction:

CO2  +   H2O   <—->   H2CO3     <—->   H+   HCO3-

i believe the answer is a or 1

the corpus luteum secretes estrogens and progesterone. the latter hormone causes changes in the uterus that make it more suitable for implantation of the fertilized ovum and the nourishment of the embryo. if the egg is not fertilized, the corpus luteum becomes inactive after 10–14 days, and menstruation occurs.

i hope this : )