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.
Source: animals.nationalgeographic.com, Image: Wikipedia. Viper snakes are considered some of the most venomous reptiles in the world and they eat small animals (rats, for example), which they hunt by striking and envenomating with their deadly, paralyzing venom.