The direct object pronoun is the pronoun acted on directly by the verb. It answers the question What? or Who? I bought it. What did you buy? It. It is the DOP. The indirect object pronoun is who or what the action was done to or for. It. I bought it for her. Who did you buy it for? Her. Her is the IOP. Sep 1, 2010 | Edited by KevinB Sep 1, 2010 | link
The venom for snakes is used to immobilize prey and then to be able to eat them. The fangs are used to bite and then the venom is injected. Approximately 375 species of snakes are able to create venom.
The components of the venom may even change over the course of a snake's life, in species (for example, certain rattlesnakes of the genus Crotalus) that rely on one set of prey animals as juveniles (cold-blooded lizards and other small exotherms), and a different set of prey animals as adults (warm-blooded rodents).