When two separate species have body structures such as specific bones that are the same but the two species are very different these structures are known as

analogous structures
homologous structures
vestigial structures
embryological structures

The correct answer is option A, Analogous structures

Explanation:

Analogous structure develop in species that live in similar kind of environment even though the two species are extremely different from each other .Being developed under similar conditions,  the function and look of the analogous structures are more or less same. For example the wings in flying animals such as bats, birds, insects, and even fish are similar to each other not only in function but also in structure (wings of all these species is primarily composed of feathers, scales, hair)

volcanoes (an event in the geosphere) release a large amount of particulate matter into the atmosphere. these particles serve as nuclei for the formation of water droplets (hydrosphere). rainfall (hydrosphere) often increases following an eruption, stimulating plant growth (biosphere).

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