Which of the following statements about pesticides and herbicides is not true? a. they can enter waterways, polluting them. b. once the pesticides and herbicides break down, they are no longer harmful. c. pesticides and herbicides are widely used in agriculture. d. pesticides and herbicides can have negative effects on the environment.

The statement about pesticides and herbicides that is not true is:

B) Once the pesticides and herbicides break down, they are no longer harmful. In fact, they remain harmful long after they break down.

Explanation:

Pesticides and herbicides are infections and, regrettably, they can harm more than just the “pests” at which they are targeted. They are toxic, and susceptibility to pesticides can not only produce a number of health effects but is connected to a range of serious illnesses and diseases in humans, from respiratory obstacles to cancer even they are broken down they are still dangerous and can infect other things.

The answer would be B.

d concave shape of wave rock

explanation:

the concave shape of wave rock is a very good evidence that supports the evolution of earth due to chemical weathering. if we talk about structure of   wave rock, studies have estimated that it is around 2.7 billion years old. it also serves as the foundation of evidence that it was the place where australian continent began to form.

how the structure of wave rock was created?

studies suggest that structure of wave rock was created when the surrounded area was started to weather due to which deposition of material started on the part of land which now contains wave rock.

the structure of wave rock is considered to be one of the best-known landforms in australia. at the height of around 15 cm, there can be found flared slopes which formulate the margins of hyden rock. it is now assumed by geologists that wave rock was created by subsurface water-induced weathering and not by glaciers, waves or wind.

due to deposition of material over the period of long time, the wave rock became tougher and tougher due to weathering from surrounding terrain. this makes it a physical evidence that supports   the evolution of earth due to chemical weathering.

hope it !