Examples of how humans negatively affect local ecosystems are A. Building dams, deforestation cutting down trees), adding point sources to nearby streams to allow for run-off, building roads and structures, and salting roads
B. Planting trees and other plants to attract native species
C. Creating laws to prohibit fishing from local streams
D. Removing non-native species from the environment.​

A.  Building dams, deforestation cutting down trees), adding point sources to nearby streams to allow for run-off, building roads and structures, and salting roads.

Explanation:

Removing non-native species from the environment helps the native ants to thrive without having any changes in the ecosystem effect them (i.e. new invasive animal).

Creating laws to prohibit fishing from local streams helps keep the fish alive and allowing them to continue to use this stream.

Planting trees and other plants to attract native species helps secure and grow the ecosystem of that area.

This leaves A as the answer.

Hope that helps you!

good one: produce hormones that plants grow.

bad one: the problem with organic matter is that while plant nutrients are needed for crop growth, they can also stimulate excessive growth of the wrong plants – mainly, algae.

yes its like the dead sea which is full of salt which makes you stay afloat

so yes an egg will float in salt