1Animals exhibiting external fertilization produce a large number of       
        gametes. Pick the appropriate reason from the following.
        (a) The animals are small in size and want to produce more offspring’s.
        (b) Food is available in plenty in water.
        (c) To ensure better chance of fertilization.      
        (d) Water promotes production of large number of gametes.

Dear student,     
Please find below the solution to the asked query                                                             

Organisms exhibiting external fertilisation release a large number of gametes into the surrounding to increase the chance of fertilisation. Because the fertilisation is external there is less possibility of fusion of gametes in the outside environment and if somehow fertilisation carried out successfully there will be chances that the externally fertilised eggs and young ones are at greater risk from predators. 

Hence, option (c) is correct.

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