How do daily human activities affect the ecosystem? . . a. they release poisonous chemicals in the environment, leading to disruption of food chains.. . b.. they lead to the vanishing of forests, causing mass extinction of species.. . c. they lead to drought conditions, causing acute water scarcity..

Answer A is correct because humans release tons of chemicals into the environment every single day. All it takes to disrupt an entire ecosystem is a chemical released into their water source, which in time slowly poisons the animals. Say a rabbit was drinking the polluted water and is now carrying the poison in it's body. A coyote comes along and eats the poisoned rabbit, and the coyote is now poisoned. That threw off the natural food chain.

Very minute and important evidence needs to be collected in order together detail and figure out what had happened