What is a major problem of human reliance on non-renewable energy sources

a. nonrenewable resources create terrible pollution problems

b. nonrenewable resources are so inexpensive that human don't rely on renewable ones

c. once non-renewable resources are used they cannot be replaced so we are not able to acquire more

d. non-renewable resources are free so people use them up quickly

plz

The correct answer is option A.

Explanation:

Non-renewable source of energy is the source of energy that can not renew after use. These are the energy source are comparatively cheap and very efficient, however, they are the biggest polluters of the environment.

These sources are altering the atmosphere of the earth by increasing the greenhouses in the environment. It included air pollution, water pollution, and damage to public health.

Thus, the correct answer is option A.

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.

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