Which mode of reproduction is matched correctly with its description?
transduction—virus transfers genes from one bacteria to another
conjugation—involves splitting of one cell and results in two identical cells
binary fission—requires direct cell-to-cell contact of bacteria
transformation—uses a pilus to transmit genetic information between bacteria

The answer is transduction—virus transfers genes from one bacteria to another.

Transduction is a process in which virus transfers genes between bacteria. It does not require physical contact between two cells. 

Conjugation is a process of transferring genetic material between bacterial cells in direct contact with each other.
Binary fission is a type of asexual reproduction in which cell after it doubles its size, simply separate into two new cells. 
Transformation is change in a genetic material due to incorporation of exogenous genetic material.

Hydrosphere is the correct answer

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