Final answer:
Option A is correct as it presents the proper sequence for sexual reproduction in diploid-dominant organisms: meiosis leads to haploid gametes, which through fertilization, create a new diploid organism.
Step-by-step explanation:
The correct sequence of events in the sexual life cycle of diploid-dominant organisms, including most animals, starts with meiosis of a diploid cell. During meiosis, the chromosome number is reduced by half, resulting in the production of haploid gametes. Following this, fertilization occurs when two haploid gametes unite to restore the diploid condition, thus forming a new diploid organism or zygote. Hence, the right order of these events is: meiosis of a diploid cell, haploid gametes produced, fertilization, new diploid organism formed, which corresponds to option A.