app/views/needs/activity.html.erb
<% content_for :page_title, "##{need.need_id}: #{format_need_goal(need.goal)}" %>
<% content_for :navigation do %>
<%= render partial: 'navigation' %>
<% end %>
<article class="need">
<section class="need-main need-activity">
<%= render partial: 'activity_items/feed',
locals: {
need: need,
activity_items: need.activity_items,
} %>
</section>
</article>