This is a thing in Amplify answer only if u've done amplify. The Chapter 2 Question is: How can we gather more evidence about whether lava or water formed the channel on Mars?

One challenge in studying the channel on Mars is that Mars is too far away for scientists to directly observe what happens there.

Based on what you learned about Gerya in the article you read today, how can scientists study Mars if they can’t directly observe what is happening there? This is a thing in Amplify answer only if u've done amplify.

Iwould choose c or d

In a right-angled triangle: 1- the hypotenuse is the longest side2- we can apply pythagorean rule which states that: (hypotenuse)^2 = (side1)^2 + (side2)^2for the given triangle,longest side is 15 cm  side1 = 9 cmside2 is 12 cm  to check whether the triangle is right-angled or not,compare (15)^2 to the summation of (9)^2 and (12)^in other words, compare 225 to the summation of 81 and 144if they are both equal, then the triangle is right-angles, otherwise, it is not.you haven't provided the diagram showing her work, so i cannot tell the choice. however, apply my explanation to the question you have.

True the answer is true

D. i believe that doesn't even exist.